下列哪项是缺铁性贫血早期检测指标() ["血清铁","血清铁蛋白","总铁结合力","转铁蛋白","转铁蛋白饱和度"]
下列哪项是血清铁降低,骨髓细胞外铁增高、内铁减少的小细胞低色素性贫血() ["缺铁性贫血","慢性感染性贫血","再生障碍贫血","溶血性贫血","铁粒幼细胞贫血"]
下列哪项贫血易引起神经及精神方面的异常,出现亚急性脊髓联合变性() ["叶酸缺乏巨幼细胞贫血","恶性贫血","抗叶酸药物引起的巨幼细胞性贫血","N5-甲基四氢叶酸还原酶缺陷巨幼细胞贫血","小肠部分切除后巨幼细胞性贫血"]
下列哪项不符合叶酸生理() ["人体本身合成部分","不耐热","是DNA合成的必需营养素","存在于绿叶蔬菜、水果中","正常人每天需要200μg"]
早期缺铁性贫血的形态学多为() ["小细胞正色素性贫血","正细胞正色素性贫血","小细胞低色素性贫血","大细胞低色素性贫血","大细胞性贫血"]
男性,68岁。主诉:左下腹痛、粪便形状改变3个月,伴便血2天急诊就诊。发病以来体重明显减轻。请针对该案例,说明问诊内容与技巧。