diff --git a/problems/二叉树的递归遍历.md b/problems/二叉树的递归遍历.md
index 11a3d716..9b4b7bc8 100644
--- a/problems/二叉树的递归遍历.md
+++ b/problems/二叉树的递归遍历.md
@@ -189,7 +189,8 @@ class Solution:
             res.append(node.val)
             dfs(node.left)
             dfs(node.right)
-        
+
+        dfs(root)
         return res
 
 ```
@@ -206,7 +207,8 @@ class Solution:
             dfs(node.left)
             res.append(node.val)
             dfs(node.right)
-        
+            
+        dfs(root)
         return res
 ```
 ```python
@@ -224,7 +226,8 @@ class Solution:
             dfs(node.left)
             dfs(node.right)
             res.append(node.val)
-        
+
+        dfs(root)
         return res
 ```