I. Etiological treatment: Etiological treatment is important for the effectiveness, speed and prevention of recurrence of anemia. Iron therapy: 1. Oral iron: The most commonly used preparations are ferrous sulfate and iron fumarate (fulvic acid). Avoid tea when taking the drug, so that iron is not absorbed by the precipitation of tannic acid. 2, injectable iron: generally try to use oral medication, only in the following cases: (1) intestinal malabsorption of iron, such as after gastrectomy or gastrointestinal anastomosis, chronic diarrhea, steatorrhea, etc.; (2) gastrointestinal diseases can be aggravated by oral iron, such as peptic ulcer, ulcerative colitis, segmental colitis, gastrointestinal dysfunction after gastrectomy and persistent vomiting during pregnancy (3) severe gastrointestinal reactions despite the reduction of oral iron doses. The commonly used iron injections are iron dextran and iron sorbitol citrate. 3. Adjuvant therapy: strengthen nutrition and increase iron-rich foods.