— I'm afraid I can't memorize so many new words in 2 days.

— _______. [ ]

A. Don't be afraid

B. You are clever

C. Not at all

D. Take your time

临床反应机采血小板比手工血小板质量好。（）

A.无效输注出现迟。

B.止血效果好。

C.不可能血小板配型。

D.单袋血小板数2.0×10¹⁰。

E.单袋血小板数2.5×10¹¹。