一位AB型患者得了血小板减少性紫癜，急需血小板输注，但该医院无同型血小板，他的弟弟恰好是AB型。

他的弟弟要想给他献血小板必须满足（）。

A.16岁

B.17岁

C.18岁

D.19岁

E.20岁

It's wellknown that the world economic situation will get worse________.[ ]

A. not if dealt carefully with

B. if not carefully dealt with

C. if dealt not carefully with

D. not if carefully dealt with