---What about ______ conference you attended last week?

---To tell the truth, it was too boring, you know, _____ conference like that.

A．a, the

B．the, /

C．the, a

D．the, the

女，60岁，行右上颌颌骨肿瘤切除，左侧牙位正常，下颌牙列完整，上下颌关系协调。

对颌面缺损患者进行早期修复的意义如下，除了（）

A.对患者心理起一定安慰作用

B.保护创面

C.防止周围组织挛缩

D.有利于咀嚼功能

E.有利于呼吸功能