—I’m so tired,helping the family with the work in the field.

—Why not take a rest,then?

—___________.

A．Because I have no time

B．Maybe I should

C．Sorry,I can’t tell you about it

D．I don’t know it

急性失血性贫血是（）

A.大细胞性贫血

B.正细胞性贫血

C.单纯小细胞性贫血

D.造血不良性贫血

E.低色素小细胞性贫血