diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json
index 8dd465d4..34992b79 100644
--- a/题库0.3/Problems.json
+++ b/题库0.3/Problems.json
@@ -682551,13 +682551,14 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "$(-1,-\\dfrac{1}{2}$",
+        "ans": "$(-1,-\\dfrac{1}{2})$",
         "solution": "",
         "duration": -1,
         "usages": [],
         "origin": "导学先锋必修第四章测验试题9",
         "edit": [
-            "20240307\t朱敏慧"
+            "20240307\t朱敏慧",
+            "20240308\t"
         ],
         "same": [],
         "related": [