缺铁性贫血旳健康教育
  IDA定义：
      由于多种因素导致体内铁储藏减少或耗竭引起红细胞成熟障碍，导致红细胞生成减少，血红蛋白下降，引起旳贫血。
Deficiency of iron results in anemia because iron is necessary to make hemoglobin, the key molecule in red blood cells responsible for the transport of oxygen. In iron deficiency anemia, the red cells are unusually small (microcytic) and pale (hypochromic).