【名词&注释】
紫外线(ultraviolet)、原发性(primary)、冷冻干燥(freeze-drying)、缺铁性贫血(iron deficiency anemia)、红细胞(erythrocyte)、胃肠道(gastrointestinal)、有价值(valuable)、总铁结合力(total iron binding capacity)、骨髓细胞外铁、运铁蛋白饱和度(transferrin saturation)
[单选题]缺铁性贫血患者的实验室检查是
A. 血清铁降低,总铁结合力(total iron binding capacity)降低
B. 血清铁降低,总铁结合力(total iron binding capacity)正常
C. 血清铁正常,总铁结合力(total iron binding capacity)降低
D. 血清铁降低,总铁结合力(total iron binding capacity)增高
E. 血清铁和总铁结合力(total iron binding capacity)增高