diff --git a/problems/0704.二分查找.md b/problems/0704.二分查找.md
index c7207364..8b000e41 100644
--- a/problems/0704.二分查找.md
+++ b/problems/0704.二分查找.md
@@ -153,6 +153,10 @@ Java：
 ```java
 class Solution {
     public int search(int[] nums, int target) {
+        // 避免当 target 小于nums[0] nums[nums.length - 1]时多次循环运算
+        if (target < nums[0] || target > nums[nums.length - 1]) {
+            return -1;
+        }
         int left = 0, right = nums.length - 1;
         while (left <= right) {
             int mid = left + ((right - left) >> 1);