If you ________ to their home, remember to bring a small gift.

A．invite

B．were invited

C．have been invited

D．had been invited

血涂片上大红细胞增多的病理状态包括（）。

A.长期叶酸缺乏

B.长期维生素B₁₂缺乏

C.缺铁性贫血

D.溶血性贫血

E.骨髓增生异常综合征