小细胞低色素性贫血见于() ["A．缺铁性贫血","B．地中海贫血","C．铁粒幼细胞性贫血","D．再生障碍性贫血","E．急性失血性贫血"]
缺铁性贫血所致外胚叶营养障碍，临床表现有() ["A．毛发干枯脱落","B．皮肤干燥发皱","C．指甲扁平或反甲","D．杵状指","E．吞咽困难"]
肾脏哪一个部位分泌肾素() ["A．肾小球基膜","B．肾髓质","C．肾小管","D．肾小球系膜","E．肾小球旁器"]
正常人铁剂吸收的部位是_______和__________。
缺铁性贫血病人补铁治疗后首先表现为___________上升。
巨幼细胞贫血是缺少________和__________。
