diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index 87c4893f..59684f09 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -878,19 +878,20 @@ def GenerateLessonPreparation(notetitle, outputdir, adict, prodict, objdict, les
 
 
     for lid in adict:
-        if lid in lessonsdict:
-            output += "\\section{%s \ %s}\n\n"%(lid,lessonsdict[lid]["name"])
+        if all(elem in lessonsdict for elem in lid.split("&")):
+            lessons = lid.split("&")
+            lessonname = "\&".join([lessonsdict[lesson]["name"] for lesson in lessons])
+            output += "\\section{%s \ %s}\n\n"%(lid.replace("&","\&"),lessonname)
             output += "\\subsection{课时目标}\n\n"
             output += "\\begin{enumerate}\n\n"
             for objid in objdict:
-                if objid.startswith(lid):
+                if objid[:5] in lid:
                     output += "\\item %s \\ %s \n\n"%(objid,objdict[objid]["content"])
             output += "\\end{enumerate}\n\n"
-
             output += "\\subsection{双基梳理}\n\n"
             basic_body = ""
             for bnid in basicknowledgedict:
-                if basicknowledgedict[bnid]["lesson"] == lid:
+                if basicknowledgedict[bnid]["lesson"] in lid:
                     basic_body += "\\item %s\n\n"%basicknowledgedict[bnid]["content"]
             output += "\\begin{enumerate}\n\n %s\n\n\\end{enumerate}\n\n"%(basic_body if basic_body != "" else "\\item 暂无")
             problems_list = adict[lid]
@@ -904,7 +905,7 @@ def GenerateLessonPreparation(notetitle, outputdir, adict, prodict, objdict, les
             output += "\\subsection{课后作业}\n\n"
             output += GenerateStudentBodyString([problems_list[3]],[],prodict,consecutivenumbering=False,answered=False)
             output += "\\newpage\n\n"
-        elif "复习" in lid:
+        else:
             output += "\\section{%s}\n\n"%lid
             problems_list = adict[lid]
             output += GenerateStudentBodyString([".".join(problems_list)],[],prodict,consecutivenumbering=False,answered = False)