题目内容

男性，22岁，患类风湿关节炎3年。血红蛋白83g/L，血清铁50μg/dl，骨髓细胞外铁++～+++。主要处理是（）。

A. 注射维生素B₁₂
B. 铁剂
C. 注射丙酸睾丸酮
D. 输血
E. 治疗原发病

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