Decreased glucose tolerance belongs to pre-diabetes, active lifestyle interventions (such as medical nutrition therapy, exercise therapy, etc.) can reduce the risk of developing diabetes, and drug interventions can be considered if the effect of intensive lifestyle interventions is not satisfactory. 1. Medical nutrition therapy: pre-diabetic patients need to control the total energy intake, rational and balanced distribution of various nutrients, so as not to lead to large fluctuations in blood glucose or cause obesity. 2. Exercise therapy: regular exercise can increase insulin sensitivity, which can help control blood glucose and reduce cardiovascular risk factors, and aerobic exercise such as brisk walking, jogging, cycling and swimming can be chosen. 3. Pharmacological intervention: If the effect of diet and exercise intervention is not good, metformin and acarbose can be chosen for intervention. Patients with impaired glucose tolerance should consult a specialized physician for diagnosis and treatment.