“中焦如沤”是描绘（）

A.胃的受纳功能

B.脾的散精功能

C.小肠泌别清浊功能

D.脾胃等脏腑的消化饮食物的生理过程

E.心肺输布气血的作用

I heard a terrible noise in his room and went to see what it was all ___.

A．around

B．out

C．about

D．through