1.Avoid smoking, because smoking will aggravate the side effects of radiotherapy in the respiratory tract; 2.Avoid cold infection, because lung infection will aggravate the radiation pneumonia in the lungs; 3.Be sure to insist on doing the whole course of treatment (the dose of radiotherapy should be enough) and avoid giving up halfway; 4.Once the radiation pneumonia appears, especially the outpatient radiotherapy patients must see the doctor as soon as possible to give treatment 5.Be sure to check weekly during the course of radiotherapy Blood routine, observe the changes of white blood cells and deal with them in time. 6.Pay attention to strengthen nutrition and ensure sleep during treatment. 7.It is best to give immune booster to regulate the immune function of patients while radiotherapy.