【名词&注释】
缺铁性贫血(iron deficiency anemia)、陈旧性心肌梗死(old myocardial infarction)、总铁结合力(total iron binding capacity)、搭桥术(bypass grafting)、未饱和铁结合力(unsaturated iron-binding capacity)
[单选题]符合缺铁性贫血的是
A. 血清铁减少,未饱和铁结合力(unsaturated iron-binding capacity)增高
B. 血清铁减少,未饱和铁结合力(unsaturated iron-binding capacity)减少
C. 血清铁减少,总铁结合力正常
D. 血清铁减少,总铁结合力减低
E. 血清铁正常,未饱和铁结合力(unsaturated iron-binding capacity)减少