def add_label(self, label_text):
    """添加标签到记录文件"""
    try:
        with open(self.output_file, 'a') as f:
            timestamp = time.strftime("%Y-%m-%d %H:%M:%S")
            f.write(f"\n=== LABEL [{timestamp}]: {label_text} ===\n")
    except Exception as e:
        print(f"添加标签时出错: {e}")