diff --git a/Utilities/BinaryTree.cpp b/Utilities/BinaryTree.cpp
index cc8241e..c90b58c 100644
--- a/Utilities/BinaryTree.cpp
+++ b/Utilities/BinaryTree.cpp
@@ -8,8 +8,8 @@ Distributed under the BSD license.
 *******************************************************************/
 
 //==================================================================
-// 《剑指Offer——名企面试官精讲典型编程题》代码
-// 作者：何海涛
+// 銆婂墤鎸嘜ffer鈥斺�斿悕浼侀潰璇曞畼绮捐鍏稿瀷缂栫▼棰樸�嬩唬鐮�
+// 浣滆�咃細浣曟捣娑�
 //==================================================================
 
 #include <cstdio>
@@ -72,7 +72,7 @@ void PrintTree(const BinaryTreeNode* pRoot)
     }
 }
 
-void DestroyTree(BinaryTreeNode* pRoot)
+void DestroyTree(BinaryTreeNode*& pRoot)
 {
     if(pRoot != nullptr)
     {
diff --git a/Utilities/BinaryTree.h b/Utilities/BinaryTree.h
index 68efc4d..fdd6af1 100644
--- a/Utilities/BinaryTree.h
+++ b/Utilities/BinaryTree.h
@@ -8,8 +8,8 @@ Distributed under the BSD license.
 *******************************************************************/
 
 //==================================================================
-// 《剑指Offer——名企面试官精讲典型编程题》代码
-// 作者：何海涛
+// 銆婂墤鎸嘜ffer鈥斺�斿悕浼侀潰璇曞畼绮捐鍏稿瀷缂栫▼棰樸�嬩唬鐮�
+// 浣滆�咃細浣曟捣娑�
 //==================================================================
 
 #pragma once
@@ -25,4 +25,4 @@ __declspec( dllexport ) BinaryTreeNode* CreateBinaryTreeNode(int value);
 __declspec( dllexport ) void ConnectTreeNodes(BinaryTreeNode* pParent, BinaryTreeNode* pLeft, BinaryTreeNode* pRight);
 __declspec( dllexport ) void PrintTreeNode(const BinaryTreeNode* pNode);
 __declspec( dllexport ) void PrintTree(const BinaryTreeNode* pRoot);
-__declspec( dllexport ) void DestroyTree(BinaryTreeNode* pRoot);
+__declspec( dllexport ) void DestroyTree(BinaryTreeNode*& pRoot);