AI搜索补充无法回答时返回

src/main/java/com/zhiwei/brandkbs2/service/impl/MarkDataServiceImpl.java

@@ -4076,7 +4076,7 @@ public class MarkDataServiceImpl implements MarkDataService {
                     project.getContendList().forEach(contend -> brandStr.append("、").append(contend.getBrandName()));
                 }
                 questionPair = standardRequest(question, modelName, MessageFormat.format(QUESTION_PROMPT, brandStr));
-                if (Objects.isNull(questionPair)) {
+                if (Objects.isNull(questionPair) || Objects.equals("无法回答", questionPair.getLeft())) {
                     return null;
                 }
                 JSONObject json = JSON.parseObject(questionPair.getLeft());