—May I go out now, Dad?    

—No. You ___________let your mother know first.    [ ]

A. can

B. may

C. need

D. must

下列哪项属于化脓性中耳炎的颅外并发症()

A．耳后骨膜下脓肿

B．乙状窦血栓性静脉炎

C．迷路炎

D．周围性面瘫

E．岩锥炎