diff --git a/problems/0704.二分查找.md b/problems/0704.二分查找.md
index c7207364..96bb1fed 100644
--- a/problems/0704.二分查找.md
+++ b/problems/0704.二分查找.md
@@ -210,6 +210,47 @@ class Solution:
 
 Go：
 
+（版本一）左闭右闭区间
+
+```go
+func search(nums []int, target int) int {
+    high := len(nums)-1
+    low := 0
+    for low <= high {
+        mid := low + (high-low)/2
+        if nums[mid] == target {
+            return mid
+        } else if nums[mid] > target {
+            high = mid-1
+        } else {
+            low = mid+1
+        }
+    }
+    return -1
+}
+```
+
+（版本二）左闭右开区间
+
+```go
+func search(nums []int, target int) int {
+    high := len(nums)
+    low := 0
+    for low < high {
+        mid := low + (high-low)/2
+        if nums[mid] == target {
+            return mid
+        } else if nums[mid] > target {
+            high = mid
+        } else {
+            low = mid+1
+        }
+    }
+    return -1
+}
+```
+
+
 
 
 
@@ -217,4 +258,4 @@ Go：
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)
 * B站视频：[代码随想录](https://space.bilibili.com/525438321)
 * 知识星球：[代码随想录](https://mp.weixin.qq.com/s/QVF6upVMSbgvZy8lHZS3CQ)
-<div align="center"><img src=../pics/公众号.png width=450 alt=> </img></div>
\ No newline at end of file
+<div align="center"><img src=../pics/公众号.png width=450 alt=> </img></div>