I want to thank my friend John, without _____ help, I wouldn't have been saved.

A．his

B．whose

C．whom

D．Which

下列不属枕骨大孔疝的常见症状的是（）

A.剧烈头痛、呕吐

B.颈项强直

C.早期出现一侧瞳孔散大

D.意识障碍

E.呼吸骤停发生早