【实验室检查】1.血象由于Hb合成下降而呈小细胞低色素性贫血，外周血片可见红细胞大小不等，中央浅染区扩大，出现异形、靶形、碎片红细胞和有核红细胞、点彩红细胞、嗜多染性红细胞、豪-周小体等，网织红细胞正常或增多，通常≤10%。
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