Please read the _______ on the bottle and take the right amount of medicine.

A．explanations

B．introductions

C．instructions

D．descriptions

患者食欲和记忆力减退。检查：眼睑苍白，血红细胞、白细胞和血小板均减少。应首先考虑的是（）

A.再生障碍性贫血

B.缺铁性贫血

C.溶血性贫血

D.失血性贫血

E.巨幼红细胞性贫血