下列各项中，不属于肾病综合征临床特征的是（）.

A.明显水肿

B.大量蛋白尿

C.高脂血症

D.血尿

E.低蛋白血症

It is not until the disease has progressed to AIDS ____a person begins to look sick.

A．who

B．that

C．where

D．before