diff --git a/src/reverse.go b/src/reverse.go
index 8584c7e..a58f24f 100644
--- a/src/reverse.go
+++ b/src/reverse.go
@@ -13,6 +13,7 @@ func Reverse(root *ListNode) *ListNode {
 	return pre
 }
 
+/* 递归反转链表 */
 func ReverseRec(root *ListNode) *ListNode {
 	if root == nil || root.Next == nil {
 		return root