患者，女性，28岁。因皮肤发红，有瘀斑，伴牙龈出血来就诊。2周前曾有上呼吸道病毒感染。实验室检查示：出血时间延长，血小板计数低，皮肤束臂试验阳性，骨髓象：幼稚型巨核细胞增多。

为防止发生颅内出血，应监测患者的血小极不低于（）。

A.20×10⁹／L

B.40×10⁹/L

C.60×10⁹/L

D.70×10⁹/L

E.80×10⁹／L

— _____ made Daisy wild with joy?

— Her success in the A-level exam this year. [ ]

A. How was it that

B. When was it that

C. Why was it that

D. What was it that