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患者女，65岁，因“反复黑粪3个月”来诊。既往体健，近期无服药史，无毒物接触史，无输血史，无肝炎病史，无出血性疾病家族史。查体：双下肢皮肤出血点。血常规：Hb90g/L，WBC5.0×109/L，PLT30×109/L，平均红细胞体积78fl。

目前应考虑的诊断有（）

A.缺铁性贫血

B.骨髓增生异常综合征

C.特发性血小板减少性紫癜

D.急性白血病

E.胃癌

F.弥散性血管内凝血

答案

参考答案：A, B, C, D, E

单项选择题

The parents of a child being discharged from the day surgery center after insertion of tympanostomy tubes ask the nurse. "What will happen to the tubes in my child's ears" Which of the following would be the nurse's best response

A．"The tubes usually dissolve on their own in about 1 year. "

B．"The tubes must remain permanently in place. "

C．"You'll probably see them fall out in about 6 months. "

D．"Call for an appointment to have them removed in about 6 months. "
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单项选择题

黑白瓶测氧法测定初级生产力的采样中，在水深小于3m的浅水湖泊，可按（）分层挂瓶。

A.0.0m，0.5m，1m，2m，3m

B.0.5m，1m

C.1m，2m
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