— Your watch looks really nice.

— I ______ it in a small shop last week.

A．bought

B．have bought

C．will buy

D．buy

女性，32岁。妊娠7个月，既往月经量过多。实验室检查：HGB72g/L，RBC3.1×10¹²/L，网织红细胞2.2%，血清铁6.3μmol/L，总铁结合力85.24μmol/L，血清总胆红素10.1μmol/L，最可能的诊断是（）。

A.巨幼细胞性贫血

B.缺铁性贫血

C.慢性病贫血

D.溶血性贫血

E.铁粒幼细胞性贫血