A．(A) Because we often take our ability of listening for granted.

B．(B) Because we are surrounded by all sorts of noises.

C．(C) Because we do not spend much time listening.

D．(D) Because we do not attach great importance to listening.

下列哪项指标在诊断ITP中不必要（）。

A.血小板计数

B.血小板平均体积

C.骨髓涂片检查

D.血小板寿命测定

E.血小板抗体检查