diff --git a/problems/0203.移除链表元素.md b/problems/0203.移除链表元素.md
index b79d29a5..0e461ce8 100644
--- a/problems/0203.移除链表元素.md
+++ b/problems/0203.移除链表元素.md
@@ -397,18 +397,18 @@ function removeElements(head: ListNode | null, val: number): ListNode | null {
 
 ```typescript
 function removeElements(head: ListNode | null, val: number): ListNode | null {
-    let dummyHead = new ListNode(0, head);
-    let pre: ListNode = dummyHead, cur: ListNode | null = dummyHead.next;
-    // 删除非头部节点
+    // 添加虚拟节点
+    const data = new ListNode(0, head);
+    let pre = data, cur = data.next;
     while (cur) {
         if (cur.val === val) {
-            pre.next = cur.next;
+            pre.next = cur.next
         } else {
             pre = cur;
         }
         cur = cur.next;
     }
-    return head.next;
+    return data.next;
 };
 ```