We should pay close attention to safety in schools because of frequent reports about accidents ____ students got injured or killed while in school.

A．which

B．for which

C．in which

D．what

骨髓涂片细胞形态学检查能确诊的疾病是（）

A.急性白血病

B.再生障碍性贫血

C.ITP

D.溶血性贫血

E.慢性白血病