男性，65岁，因疲劳、乏力2个月，皮肤淤斑和黑便3天来诊，发现脾肋下3cm，化验Hb155g/L，WBC14.5×109/L，PLT1032×109/L，分类N70%，L30%，诊断为骨髓增殖性疾病。
本例最可能的诊断是（）
A.慢性粒细胞白血病
B.原发性血小板增多
C.继发性血小板增多
D.骨髓增生异常综合征
E.骨髓纤维化症
参考答案：B
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| Dick had a toothache. His mother 1 him to the dentist. Before they saw the dentist, they 2 wait "Please come in!" said a nurse in a 3 dress. Dick looked afraid 4 he came into the dentist's room. "Now tell me. What's wrong 5 you?" the dentist asked. "I feel terrible. I think I've a 6 tooth", said the boy. "Well, let me have a 7 ", said the dentist kindly. Dick 8 his mouth 9 the dentist began to examine (检查) his 10 . | |||
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