diff --git a/scripts/expression_stats.py b/scripts/expression_stats.py
new file mode 100644
index 000000000..9ef1b0628
--- /dev/null
+++ b/scripts/expression_stats.py
@@ -0,0 +1,208 @@
+import time
+import sys
+import os
+from collections import defaultdict
+from typing import Dict, List, Tuple, Optional
+
+# Add project root to Python path
+project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, project_root)
+
+from src.common.database.database_model import Expression, ChatStreams
+
+
+def get_chat_name(chat_id: str) -> str:
+    """Get chat name from chat_id by querying ChatStreams table directly"""
+    try:
+        # 直接从数据库查询ChatStreams表
+        chat_stream = ChatStreams.get_or_none(ChatStreams.stream_id == chat_id)
+        if chat_stream is None:
+            return f"未知聊天 ({chat_id})"
+        
+        # 如果有群组信息，显示群组名称
+        if chat_stream.group_name:
+            return f"{chat_stream.group_name} ({chat_id})"
+        # 如果是私聊，显示用户昵称
+        elif chat_stream.user_nickname:
+            return f"{chat_stream.user_nickname}的私聊 ({chat_id})"
+        else:
+            return f"未知聊天 ({chat_id})"
+    except Exception as e:
+        return f"查询失败 ({chat_id})"
+
+
+def calculate_time_distribution(expressions) -> Dict[str, int]:
+    """Calculate distribution of last active time in days"""
+    now = time.time()
+    distribution = {
+        '0-1天': 0,
+        '1-3天': 0,
+        '3-7天': 0,
+        '7-14天': 0,
+        '14-30天': 0,
+        '30-60天': 0,
+        '60-90天': 0,
+        '90+天': 0
+    }
+    for expr in expressions:
+        diff_days = (now - expr.last_active_time) / (24*3600)
+        if diff_days < 1:
+            distribution['0-1天'] += 1
+        elif diff_days < 3:
+            distribution['1-3天'] += 1
+        elif diff_days < 7:
+            distribution['3-7天'] += 1
+        elif diff_days < 14:
+            distribution['7-14天'] += 1
+        elif diff_days < 30:
+            distribution['14-30天'] += 1
+        elif diff_days < 60:
+            distribution['30-60天'] += 1
+        elif diff_days < 90:
+            distribution['60-90天'] += 1
+        else:
+            distribution['90+天'] += 1
+    return distribution
+
+
+def calculate_count_distribution(expressions) -> Dict[str, int]:
+    """Calculate distribution of count values"""
+    distribution = {
+        '0-1': 0,
+        '1-2': 0,
+        '2-3': 0,
+        '3-4': 0,
+        '4-5': 0,
+        '5-10': 0,
+        '10+': 0
+    }
+    for expr in expressions:
+        cnt = expr.count
+        if cnt < 1:
+            distribution['0-1'] += 1
+        elif cnt < 2:
+            distribution['1-2'] += 1
+        elif cnt < 3:
+            distribution['2-3'] += 1
+        elif cnt < 4:
+            distribution['3-4'] += 1
+        elif cnt < 5:
+            distribution['4-5'] += 1
+        elif cnt < 10:
+            distribution['5-10'] += 1
+        else:
+            distribution['10+'] += 1
+    return distribution
+
+
+def get_top_expressions_by_chat(chat_id: str, top_n: int = 5) -> List[Expression]:
+    """Get top N most used expressions for a specific chat_id"""
+    return (Expression.select()
+                    .where(Expression.chat_id == chat_id)
+                    .order_by(Expression.count.desc())
+                    .limit(top_n))
+
+
+def show_overall_statistics(expressions, total: int) -> None:
+    """Show overall statistics"""
+    time_dist = calculate_time_distribution(expressions)
+    count_dist = calculate_count_distribution(expressions)
+    
+    print("\n=== 总体统计 ===")
+    print(f"总表达式数量: {total}")
+    
+    print("\n上次激活时间分布:")
+    for period, count in time_dist.items():
+        print(f"{period}: {count} ({count/total*100:.2f}%)")
+    
+    print("\ncount分布:")
+    for range_, count in count_dist.items():
+        print(f"{range_}: {count} ({count/total*100:.2f}%)")
+
+
+def show_chat_statistics(chat_id: str, chat_name: str) -> None:
+    """Show statistics for a specific chat"""
+    chat_exprs = list(Expression.select().where(Expression.chat_id == chat_id))
+    chat_total = len(chat_exprs)
+    
+    print(f"\n=== {chat_name} ===")
+    print(f"表达式数量: {chat_total}")
+    
+    if chat_total == 0:
+        print("该聊天没有表达式数据")
+        return
+    
+    # Time distribution for this chat
+    time_dist = calculate_time_distribution(chat_exprs)
+    print("\n上次激活时间分布:")
+    for period, count in time_dist.items():
+        if count > 0:
+            print(f"{period}: {count} ({count/chat_total*100:.2f}%)")
+    
+    # Count distribution for this chat
+    count_dist = calculate_count_distribution(chat_exprs)
+    print("\ncount分布:")
+    for range_, count in count_dist.items():
+        if count > 0:
+            print(f"{range_}: {count} ({count/chat_total*100:.2f}%)")
+    
+    # Top expressions
+    print("\nTop 10使用最多的表达式:")
+    top_exprs = get_top_expressions_by_chat(chat_id, 10)
+    for i, expr in enumerate(top_exprs, 1):
+        print(f"{i}. [{expr.type}] Count: {expr.count}")
+        print(f"   Situation: {expr.situation}")
+        print(f"   Style: {expr.style}")
+        print()
+
+
+def interactive_menu() -> None:
+    """Interactive menu for expression statistics"""
+    # Get all expressions
+    expressions = list(Expression.select())
+    if not expressions:
+        print("数据库中没有找到表达式")
+        return
+    
+    total = len(expressions)
+    
+    # Get unique chat_ids and their names
+    chat_ids = list(set(expr.chat_id for expr in expressions))
+    chat_info = [(chat_id, get_chat_name(chat_id)) for chat_id in chat_ids]
+    chat_info.sort(key=lambda x: x[1])  # Sort by chat name
+    
+    while True:
+        print("\n" + "="*50)
+        print("表达式统计分析")
+        print("="*50)
+        print("0. 显示总体统计")
+        
+        for i, (chat_id, chat_name) in enumerate(chat_info, 1):
+            chat_count = sum(1 for expr in expressions if expr.chat_id == chat_id)
+            print(f"{i}. {chat_name} ({chat_count}个表达式)")
+        
+        print("q. 退出")
+        
+        choice = input("\n请选择要查看的统计 (输入序号): ").strip()
+        
+        if choice.lower() == 'q':
+            print("再见！")
+            break
+        
+        try:
+            choice_num = int(choice)
+            if choice_num == 0:
+                show_overall_statistics(expressions, total)
+            elif 1 <= choice_num <= len(chat_info):
+                chat_id, chat_name = chat_info[choice_num - 1]
+                show_chat_statistics(chat_id, chat_name)
+            else:
+                print("无效的选择，请重新输入")
+        except ValueError:
+            print("请输入有效的数字")
+        
+        input("\n按回车键继续...")
+
+
+if __name__ == "__main__":
+    interactive_menu() 
\ No newline at end of file
diff --git a/scripts/interest_value_analysis.py b/scripts/interest_value_analysis.py
new file mode 100644
index 000000000..9a624df34
--- /dev/null
+++ b/scripts/interest_value_analysis.py
@@ -0,0 +1,284 @@
+import time
+import sys
+import os
+from collections import defaultdict
+from typing import Dict, List, Tuple, Optional
+from datetime import datetime, timedelta
+
+# Add project root to Python path
+project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, project_root)
+
+from src.common.database.database_model import Messages, ChatStreams
+
+
+def get_chat_name(chat_id: str) -> str:
+    """Get chat name from chat_id by querying ChatStreams table directly"""
+    try:
+        chat_stream = ChatStreams.get_or_none(ChatStreams.stream_id == chat_id)
+        if chat_stream is None:
+            return f"未知聊天 ({chat_id})"
+        
+        if chat_stream.group_name:
+            return f"{chat_stream.group_name} ({chat_id})"
+        elif chat_stream.user_nickname:
+            return f"{chat_stream.user_nickname}的私聊 ({chat_id})"
+        else:
+            return f"未知聊天 ({chat_id})"
+    except Exception:
+        return f"查询失败 ({chat_id})"
+
+
+def format_timestamp(timestamp: float) -> str:
+    """Format timestamp to readable date string"""
+    try:
+        return datetime.fromtimestamp(timestamp).strftime("%Y-%m-%d %H:%M:%S")
+    except (ValueError, OSError):
+        return "未知时间"
+
+
+def calculate_interest_value_distribution(messages) -> Dict[str, int]:
+    """Calculate distribution of interest_value"""
+    distribution = {
+        '0.000-0.010': 0,
+        '0.010-0.050': 0,
+        '0.050-0.100': 0,
+        '0.100-0.500': 0,
+        '0.500-1.000': 0,
+        '1.000-2.000': 0,
+        '2.000-5.000': 0,
+        '5.000-10.000': 0,
+        '10.000+': 0
+    }
+    
+    for msg in messages:
+        if msg.interest_value is None:
+            continue
+        
+        value = float(msg.interest_value)
+        if value < 0.010:
+            distribution['0.000-0.010'] += 1
+        elif value < 0.050:
+            distribution['0.010-0.050'] += 1
+        elif value < 0.100:
+            distribution['0.050-0.100'] += 1
+        elif value < 0.500:
+            distribution['0.100-0.500'] += 1
+        elif value < 1.000:
+            distribution['0.500-1.000'] += 1
+        elif value < 2.000:
+            distribution['1.000-2.000'] += 1
+        elif value < 5.000:
+            distribution['2.000-5.000'] += 1
+        elif value < 10.000:
+            distribution['5.000-10.000'] += 1
+        else:
+            distribution['10.000+'] += 1
+    
+    return distribution
+
+
+def get_interest_value_stats(messages) -> Dict[str, float]:
+    """Calculate basic statistics for interest_value"""
+    values = [float(msg.interest_value) for msg in messages if msg.interest_value is not None]
+    
+    if not values:
+        return {
+            'count': 0,
+            'min': 0,
+            'max': 0,
+            'avg': 0,
+            'median': 0
+        }
+    
+    values.sort()
+    count = len(values)
+    
+    return {
+        'count': count,
+        'min': min(values),
+        'max': max(values),
+        'avg': sum(values) / count,
+        'median': values[count // 2] if count % 2 == 1 else (values[count // 2 - 1] + values[count // 2]) / 2
+    }
+
+
+def get_available_chats() -> List[Tuple[str, str, int]]:
+    """Get all available chats with message counts"""
+    try:
+        # 获取所有有消息的chat_id
+        chat_counts = {}
+        for msg in Messages.select(Messages.chat_id).distinct():
+            chat_id = msg.chat_id
+            count = Messages.select().where(
+                (Messages.chat_id == chat_id) & 
+                (Messages.interest_value.is_null(False))
+            ).count()
+            if count > 0:
+                chat_counts[chat_id] = count
+        
+        # 获取聊天名称
+        result = []
+        for chat_id, count in chat_counts.items():
+            chat_name = get_chat_name(chat_id)
+            result.append((chat_id, chat_name, count))
+        
+        # 按消息数量排序
+        result.sort(key=lambda x: x[2], reverse=True)
+        return result
+    except Exception as e:
+        print(f"获取聊天列表失败: {e}")
+        return []
+
+
+def get_time_range_input() -> Tuple[Optional[float], Optional[float]]:
+    """Get time range input from user"""
+    print("\n时间范围选择:")
+    print("1. 最近1天")
+    print("2. 最近3天") 
+    print("3. 最近7天")
+    print("4. 最近30天")
+    print("5. 自定义时间范围")
+    print("6. 不限制时间")
+    
+    choice = input("请选择时间范围 (1-6): ").strip()
+    
+    now = time.time()
+    
+    if choice == "1":
+        return now - 24*3600, now
+    elif choice == "2":
+        return now - 3*24*3600, now
+    elif choice == "3":
+        return now - 7*24*3600, now
+    elif choice == "4":
+        return now - 30*24*3600, now
+    elif choice == "5":
+        print("请输入开始时间 (格式: YYYY-MM-DD HH:MM:SS):")
+        start_str = input().strip()
+        print("请输入结束时间 (格式: YYYY-MM-DD HH:MM:SS):")
+        end_str = input().strip()
+        
+        try:
+            start_time = datetime.strptime(start_str, "%Y-%m-%d %H:%M:%S").timestamp()
+            end_time = datetime.strptime(end_str, "%Y-%m-%d %H:%M:%S").timestamp()
+            return start_time, end_time
+        except ValueError:
+            print("时间格式错误，将不限制时间范围")
+            return None, None
+    else:
+        return None, None
+
+
+def analyze_interest_values(chat_id: Optional[str] = None, start_time: Optional[float] = None, end_time: Optional[float] = None) -> None:
+    """Analyze interest values with optional filters"""
+    
+    # 构建查询条件
+    query = Messages.select().where(Messages.interest_value.is_null(False))
+    
+    if chat_id:
+        query = query.where(Messages.chat_id == chat_id)
+    
+    if start_time:
+        query = query.where(Messages.time >= start_time)
+    
+    if end_time:
+        query = query.where(Messages.time <= end_time)
+    
+    messages = list(query)
+    
+    if not messages:
+        print("没有找到符合条件的消息")
+        return
+    
+    # 计算统计信息
+    distribution = calculate_interest_value_distribution(messages)
+    stats = get_interest_value_stats(messages)
+    
+    # 显示结果
+    print(f"\n=== Interest Value 分析结果 ===")
+    if chat_id:
+        print(f"聊天: {get_chat_name(chat_id)}")
+    else:
+        print("聊天: 全部聊天")
+    
+    if start_time and end_time:
+        print(f"时间范围: {format_timestamp(start_time)} 到 {format_timestamp(end_time)}")
+    elif start_time:
+        print(f"时间范围: {format_timestamp(start_time)} 之后")
+    elif end_time:
+        print(f"时间范围: {format_timestamp(end_time)} 之前")
+    else:
+        print("时间范围: 不限制")
+    
+    print(f"\n基本统计:")
+    print(f"有效消息数量: {stats['count']}")
+    print(f"最小值: {stats['min']:.3f}")
+    print(f"最大值: {stats['max']:.3f}")
+    print(f"平均值: {stats['avg']:.3f}")
+    print(f"中位数: {stats['median']:.3f}")
+    
+    print(f"\nInterest Value 分布:")
+    total = stats['count']
+    for range_name, count in distribution.items():
+        if count > 0:
+            percentage = count / total * 100
+            print(f"{range_name}: {count} ({percentage:.2f}%)")
+
+
+def interactive_menu() -> None:
+    """Interactive menu for interest value analysis"""
+    
+    while True:
+        print("\n" + "="*50)
+        print("Interest Value 分析工具")
+        print("="*50)
+        print("1. 分析全部聊天")
+        print("2. 选择特定聊天分析")
+        print("q. 退出")
+        
+        choice = input("\n请选择分析模式 (1-2, q): ").strip()
+        
+        if choice.lower() == 'q':
+            print("再见！")
+            break
+        
+        chat_id = None
+        
+        if choice == "2":
+            # 显示可用的聊天列表
+            chats = get_available_chats()
+            if not chats:
+                print("没有找到有interest_value数据的聊天")
+                continue
+            
+            print(f"\n可用的聊天 (共{len(chats)}个):")
+            for i, (cid, name, count) in enumerate(chats, 1):
+                print(f"{i}. {name} ({count}条有效消息)")
+            
+            try:
+                chat_choice = int(input(f"\n请选择聊天 (1-{len(chats)}): ").strip())
+                if 1 <= chat_choice <= len(chats):
+                    chat_id = chats[chat_choice - 1][0]
+                else:
+                    print("无效选择")
+                    continue
+            except ValueError:
+                print("请输入有效数字")
+                continue
+        
+        elif choice != "1":
+            print("无效选择")
+            continue
+        
+        # 获取时间范围
+        start_time, end_time = get_time_range_input()
+        
+        # 执行分析
+        analyze_interest_values(chat_id, start_time, end_time)
+        
+        input("\n按回车键继续...")
+
+
+if __name__ == "__main__":
+    interactive_menu() 
\ No newline at end of file
diff --git a/src/chat/replyer/default_generator.py b/src/chat/replyer/default_generator.py
index 237639a47..68e896fab 100644
--- a/src/chat/replyer/default_generator.py
+++ b/src/chat/replyer/default_generator.py
@@ -60,7 +60,6 @@ def init_prompt():
 现在请你读读之前的聊天记录，并给出回复
 {config_expression_style}。注意不要复读你说过的话
 {keywords_reaction_prompt}
-请注意不要输出多余内容(包括前后缀，冒号和引号，at或 @等 )。只输出回复内容。
 {moderation_prompt}
 不要浮夸，不要夸张修辞，不要输出多余内容(包括前后缀，冒号和引号，括号()，表情包，at或 @等 )。只输出回复内容""",
         "default_generator_prompt",