diff --git a/__pycache__/toc_parse.cpython-312.pyc b/__pycache__/toc_parse.cpython-312.pyc
index 01f4f7b..9e5f492 100644
Binary files a/__pycache__/toc_parse.cpython-312.pyc and b/__pycache__/toc_parse.cpython-312.pyc differ
diff --git a/annotationdata.py b/annotationdata.py
index ef1a192..5fa5343 100644
--- a/annotationdata.py
+++ b/annotationdata.py
@@ -1,3 +1,18 @@
+"""
+annotationdata.py
+-----------------
+功能：
+    - 解析iBooks的AEAnnotation.sqlite数据库，提取所有或指定书籍（assetid/bookid）的笔记。
+    - 提供parse_location辅助函数，解析笔记定位信息。
+    - 返回结构化的annotations数据，便于后续章节定位与导出。
+
+主要接口：
+    - get_annotations(db_path, bookid=None)：返回所有或指定assetid的笔记，结构为{assetid: {uuid: {...}}}
+    - parse_location(location)：解析ZANNOTATIONLOCATION，返回(idref, filepos)
+
+依赖：sqlite3, collections, re, os, datetime
+"""
+
 import sqlite3
 from collections import defaultdict
 import re
diff --git a/booklist_parse.py b/booklist_parse.py
index 7342f65..17b0444 100644
--- a/booklist_parse.py
+++ b/booklist_parse.py
@@ -1,3 +1,20 @@
+"""
+booklist_parse.py
+-----------------
+功能：
+    - 解析iBooks的Books.plist，提取所有书籍元数据（书名、作者、路径、时间等）。
+    - 解析BKLibrary.sqlite，获取每本书的最近打开时间（苹果时间戳，基准2001-01-01）。
+
+主要接口：
+    - parse_books_plist(plist_path)：返回所有书籍元数据，结构为{bk_id: {...}}
+    - get_books_last_open(db_path)：返回所有书籍最近打开时间，结构为{bk_id: {'last_open': 时间戳}}
+
+依赖：plistlib, collections, sqlite3, os, datetime
+
+典型用法：
+    booksinfo = parse_books_plist('./data/Books.plist')
+    books_open = get_books_last_open('data/BKLibrary.sqlite')
+"""
 import plistlib
 from collections import defaultdict
 
diff --git a/data/AEAnnotation.sqlite b/data/AEAnnotation.sqlite
index 962b917..c1a9fdd 100644
Binary files a/data/AEAnnotation.sqlite and b/data/AEAnnotation.sqlite differ
diff --git a/data/AEAnnotation.sqlite-shm b/data/AEAnnotation.sqlite-shm
deleted file mode 100644
index ee3a182..0000000
Binary files a/data/AEAnnotation.sqlite-shm and /dev/null differ
diff --git a/data/AEAnnotation.sqlite-wal b/data/AEAnnotation.sqlite-wal
deleted file mode 100644
index 2771830..0000000
Binary files a/data/AEAnnotation.sqlite-wal and /dev/null differ
diff --git a/data/Books.plist b/data/Books.plist
index e7588e3..b4f1fd4 100644
Binary files a/data/Books.plist and b/data/Books.plist differ
diff --git a/export_notes/notes_export_474FB2345D27062AE3A4DF339A30498E.md b/export_notes/notes_export_474FB2345D27062AE3A4DF339A30498E.md
index c2971aa..fc95f80 100644
--- a/export_notes/notes_export_474FB2345D27062AE3A4DF339A30498E.md
+++ b/export_notes/notes_export_474FB2345D27062AE3A4DF339A30498E.md
@@ -1,4 +1,4 @@
-# 笔记导出 2025-08-12 15:03
+# 笔记导出 2025-08-12 19:48
 
 
 ## 明夷待访录·破邪论(精)--中华经典名著全本全注全译 (中华书局)
diff --git a/export_notes/notes_export_B18FCD9F90FD43C2373AE52BAEF9A77C.md b/export_notes/notes_export_B18FCD9F90FD43C2373AE52BAEF9A77C.md
index 47bdc14..0f75c0e 100644
--- a/export_notes/notes_export_B18FCD9F90FD43C2373AE52BAEF9A77C.md
+++ b/export_notes/notes_export_B18FCD9F90FD43C2373AE52BAEF9A77C.md
@@ -1,4 +1,4 @@
-# 笔记导出 2025-08-12 15:02
+# 笔记导出 2025-08-12 21:16
 
 
 ## 传统十论
diff --git a/exportbooknotes.py b/exportbooknotes.py
index b1934e4..a66214a 100644
--- a/exportbooknotes.py
+++ b/exportbooknotes.py
@@ -1,4 +1,29 @@
 """
+exportbooknotes.py
+------------------
+功能：
+    - 自动同步iBooks数据库和元数据文件到本地data目录。
+    - 解析AEAnnotation.sqlite、Books.plist、BKLibrary.sqlite，构建结构化笔记数据。
+    - 解析epub目录和章节信息，定位每条笔记所属章节。
+    - 命令行菜单按最近打开时间降序展示书籍列表，供用户选择导出。
+    - 仅导出选中书籍的所有笔记，按章节分组，生成Markdown文件。
+
+主要数据流：
+    1. 数据同步到data目录
+    2. 解析Books.plist获取书籍元数据
+    3. 解析BKLibrary.sqlite获取最近打开时间
+    4. 菜单排序与显示（书名+时间戳）
+    5. 解析AEAnnotation.sqlite获取笔记
+    6. 解析epub目录，定位章节
+    7. 导出Markdown文件
+
+依赖：Python 3, InquirerPy, bs4, shutil, os, datetime, sqlite3
+
+典型用法：
+    python exportbooknotes.py
+    # 按提示选择书籍，自动导出笔记到export_notes目录
+"""
+"""
 自动生成 booksnote 数据结构：
 booksnote = {
   assetid: { label_path: { uuid: {
@@ -17,6 +42,7 @@ from booklist_parse import parse_books_plist
 from opf_parse import parse_opf
 from toc_parse import parse_navpoints, find_label_path
 from bs4 import BeautifulSoup
+from pprint import pprint
 
 def find_file_by_ext(root, exts):
     """在root下递归查找第一个指定后缀的文件"""
@@ -31,7 +57,11 @@ def get_toc_tree(toc_path):
     with open(toc_path, 'r', encoding='utf-8') as f:
         soup = BeautifulSoup(f, 'xml')
     nav_map = soup.find('navMap')
-    return parse_navpoints(nav_map.find_all('navPoint', recursive=False))
+
+    nav_points = nav_map.find_all('navPoint', recursive=False)
+    toc_tree = parse_navpoints(nav_points)
+    #pprint(toc_tree, indent=2, depth=5)
+    return toc_tree
 
 def build_booksnote(annotation_db='data/AEAnnotation.sqlite', books_plist='data/Books.plist', bookid=None):
     # 支持只处理特定 assetid 的笔记
@@ -132,7 +162,7 @@ if __name__ == '__main__':
             print(f'file not found: {src} ')
 
     from booklist_parse import parse_books_plist
-    from InquirerPy import inquirer
+    from InquirerPy import inquirer # type: ignore
 
     # 先获取所有书籍元数据
     booksinfo = parse_books_plist('data/Books.plist')
diff --git a/toc_parse.py b/toc_parse.py
index 30bfc3e..0bd5256 100644
--- a/toc_parse.py
+++ b/toc_parse.py
@@ -109,10 +109,14 @@ def find_label_path(
             if "label" in v:
                 new_path = path + [v["label"]]
                 if v["ref"] == ref and (filepos is None or v["filepos"] == filepos):
-                    return " / ".join(new_path)
-                found = find_label_path(v["children"], ref, filepos, new_path)
-                if found:
-                    return found
+                    title = " / ".join(new_path)
+                    #print(f'title ref={ref} filepos={filepos} -> {title}') #DBG
+                    return title
+                title = find_label_path(v["children"], ref, filepos, new_path)
+                if title:
+                    #print(f'title1 ref={ref} filepos={filepos} -> {title}') #DBG
+                    return title
+
         # 2. 如果带filepos查找失败，回退到同ref下第一个章节（即只要ref匹配就返回）
         if filepos is not None:
             for v in nodes:
@@ -120,10 +124,13 @@ def find_label_path(
                     new_path = path + [v["label"]]
                     # print(f"对比 {v['ref']} == {ref}")
                     if v["ref"].split("#", 1)[0] == ref.split("#", 1)[0]:
-                        return " / ".join(new_path)
-                    found = find_label_path(v["children"], ref, None, new_path)
-                    if found:
-                        return found
+                        title = " / ".join(new_path)
+                        #print(f'title3 ref={ref} filepos={filepos} -> {title}') #DBG
+                        return title
+                    title = find_label_path(v["children"], ref, None, new_path)
+                    if title:
+                        #print(f'title4 ref={ref} filepos={filepos} -> {title}') #DBG
+                        return title
 
     # 3. 若完全未找到，尝试直接解析idref所指html文件标题，获取章节label信息
     # 仅在顶层调用时执行此逻辑