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所指结点后插入q所指的新结点,下列( )操作序列是正确的。
A) q↑.rlink:=p; q↑.llink:=p↑.llink; p↑.rlink↑.rlink:=q; p↑.11ink:=q;
B) q↑llink:=p; q↑.rlink:=p↑.rlink; p↑rlink↑.llink:=q; p↑rlink:=q;
C) p↑.llink↑.rlink:=q; p↑.llink:=q; q↑rlink:=p; q↑.llink:=p↑.llink;
D) p↑.rlink↑.llink:=q; p↑.rlink:=q; q↑llink:=p; q↑rlink:=p↑.rlink;