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【单选题】
27岁女性患者，月经量多，头晕耳鸣3，检查发现为缺铁性贫血，铁剂治疗血红蛋白恢复正常后至少持续多长时间停药
A.
1～2个月
B.
2～3个月
C.
3～4个月
D.
4～6个月
E.
7～10个月
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