(2) oral iron: oral iron is an effective drug for the treatment of iron deficiency anemia. Ferrous sulfate is commonly used, each time 0.3~0.6g, oral 3 times, after meals, can not drink tea. 8~12 weeks for a course of treatment. Can also be added at the same time to promote iron absorption of vitamin C, each 50 ~ 100mg, 3 times a day