![](https://static.youtibao.com/asksite/comm/pc/images/content_title_q.png)
双链表的每个结点包括两个指针域。其中rlink指向结点的后继,llink指向结点的前驱。如果要在p所指结
A.p↑.rlink↑.llink:=q;p↑.rlink:=q;q↑.llink:=p;q↑.rlink:=p↑.rlink;
B.p↑.llink↑.rlink:=q;p↑.llink:=q;q↑.rlink:=p;q↑.llink:=p↑.llink;
C.q↑.llink:=p;q↑.rlink:=p↑.rlink;p↑.rlink ↑.llink:=q;p↑.rlink:=q;
D.q↑.rlink:=p;q↑.llink:=p↑.llink;p↑.llink ↑.rlink:=q;p↑.llink:=q;
![](https://static.youtibao.com/asksite/comm/pc/images/content_title_a.png)