一产妇患胎盘早剥， * * 流血不止，2天内共输血2000毫升，止血效果不佳，皮肤黏膜有广泛出血点，柏油样大便，尿镜检可见少量红细胞。

其出血不止的原因可能是（）

A.急性ITP

B.肝功能受损致凝血功能障碍

C.并发急性再障

D.并发DIC

E.输血过多致稀释性血小板减少

—David, look at the man in white over there. Can you tell me        ?  

—He is a doctor.  [ ]

A. who is he

B. who he is

C. what is he

D. what he is