解决出现预设场景，历史不展示的情况2

src/server/qa.py

@@ -157,7 +157,7 @@ class QA:
         history.append((_question, self.cur_answer))
         async for token in callback.aiter():
             self.cur_answer += token
-            if self.contains_blocked_keywords(self.cur_answer):
+            if self.contains_blocked_keywords(_question):
                 self.cur_answer = SAFE_RESPONSE
                 history[-1] = (_question, self.cur_answer)
                 yield history