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 2ce9831e..a1d49e98 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 +189,6 @@ class Solution:
             res.append(node.val)
             dfs(node.left)
             dfs(node.right)
-
         dfs(root)
         return res
 
@@ -207,7 +206,6 @@ class Solution:
             dfs(node.left)
             res.append(node.val)
             dfs(node.right)
-            
         dfs(root)
         return res
 ```