”What’s wrong?” I asked when I saw the little boy outside the window.

A．How is it going?

B．What are you doing?

C．What does it like

D．What’s the matter?

患者男。出现呕吐，呕吐物为胃内容物，经检查诊断为中枢性呕吐。该患者呕吐的病因为（）

A.脑膜炎

B.急性阑尾炎

C.青光眼

D.急性胆囊炎

E.屈光不正