diff --git a/problems/0110.平衡二叉树.md b/problems/0110.平衡二叉树.md
index ec120bcc..a4339ac3 100644
--- a/problems/0110.平衡二叉树.md
+++ b/problems/0110.平衡二叉树.md
@@ -611,7 +611,7 @@ class Solution:
             if node:
                 stack.append(node)              # 中
                 stack.append(None)
-                # 采用数组进行迭代，先将右子树加入，保证左节点能够先出栈
+                # 采用数组进行迭代，先将右节点加入，保证左节点能够先出栈
                 if node.right:                  # 右
                     stack.append(node.right)
                 if node.left:                   # 左