— （）
—I'm suffering from a stomachache.

A. Are you feeling better

B. What's trouble with you

C. Is there wrong with you

D. What's the matter with you

小儿患化脓性脑膜炎时致病菌不同的主要原因是

A．年龄
B．季节
C．地区
D．先天性神经缺陷
E．机体免疫功能