diff --git a/scripts/writer.py b/scripts/writer.py
index e68aedf..846b325 100644
--- a/scripts/writer.py
+++ b/scripts/writer.py
@@ -146,8 +146,8 @@ class Writer:
 
     def _expand_section(self, section: Dict) -> str:
         content = section.get('content', '').strip()
-        # 大纲要点格式（>40% 行以 -/*/** 开头）应始终由 LLM 展开为连贯段落
-        if HAVE_LLM and self._is_bullet_only(content):
+        # 大纲要点格式（>40% 行以 -/*/** 开头）或内容过短（<100字）应由 LLM 展开为连贯段落
+        if HAVE_LLM and (self._is_bullet_only(content) or (content and len(content) < 100)):
             logger.info(f"使用 LLM 扩写章节(要点→段落): {section['title']}")
             prompt = get_prompt("section_expansion",
                 topic_title=self.topic['title'],