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【单选题】
某男性，58岁，因头晕3年余，四肢麻木2个月入院。查体：面色暗红，全身浅表淋巴结不肿大，肝肋下2指，，边界清，无压痛；脾肋下1指，，边界清。实验室检查：血常规示RBC7.2×10 12 /L，Hb220g/L，WBC22.9×10 9 /L，PLT580×10 9 /L，NAP积分为180分，BM示骨髓增生明显或极度明显活跃，红、粒、巨核三系均增生，以红系为主，各系各阶段有核细胞比值及形态大致正常，结合上述资料该病人最可能的诊断为（ ）A.
慢性粒细胞性白血病
B.
真性红细胞增多症
C.
原发性血小板增多症
D.
骨髓纤维化
E.
骨髓异常增生综合征
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