Bone marrow suppression is one of the common toxic side effects of chemotherapy, and the decrease in white blood cells can lead to a decrease in body resistance and increase the occurrence of infection. Patients with low leukocyte count should wear a mask when going out and avoid going to public places with high traffic as much as possible; family members with cold symptoms should be isolated from them; 2. Patients with low platelet count should avoid flossing with toothpicks to prevent gum damage; avoid falls and trauma; 3. Patients with moderate to severe anemia mostly have weakness symptoms and should rest more and stand slowly to reduce dizziness and postural hypotension .