— Will you go to Tom's birthday party, Sally?

— Perhaps not. I _____. [ ]

A. wasn't invited

B. didn't invite

C. haven't been invited yet

D. hasn't invited

女性，37岁，1年前诊断为再生障碍性贫血，经治疗好转。2个月来乏力、头晕加重，间有酱油色尿。查：血红蛋白60g/L，白细胞4×10/L，血小板60×10/L，网织红细胞8.4%，骨髓增生活跃，细胞外铁阴性。

对该患者下述检查最有意义的是（）

A.Coombs试验

B.酸溶血试验

C.冷热溶血试验

D.高铁血红蛋白还原试验

E.异丙醇试验