Disease analysis: Citrus fruits are rich in vitamin C, which can increase the number of phagocytes; Enhance the vitality of natural killer cells. Carrots, mangoes, sweet potatoes and other dark orange fruits and vegetables are rich in beta carotene, which can be converted into vitamin A in human body. Vitamin a can maintain the integrity of epithelial cells and mucosal tissues and reduce infection; Improve antibody reaction and promote leukocyte production; And participate in capturing free radicals that destroy cells. Suggestion: Precautions for patients with low white blood cells; High protein diet is mainly to improve the body's resistance and provide a material basis for the recovery of white blood cells. High vitamin diet and vitamins can promote the growth and development of cells. It contributes to the differentiation and proliferation of white blood cells and promotes the return to normal. Strict disinfection At this time, patients are prone to infection, so they should be strictly disinfected when making food, and never eat cold or unclean food.