A.血小板計(jì)數(shù)<80×109/L B.血小板計(jì)數(shù)<65×109/L C.血小板計(jì)數(shù)<70×109/L D.血小板計(jì)數(shù)<60×109/L E.血小板計(jì)數(shù)<50×109/L