Glucose tolerance test examination process: 1. Patients should not eat or drink after 10:00 p.m. one day before the examination, and go to the hospital for examination after 6:00 a.m. to ensure an 8-hour fasting state. 2. Patients should ensure a normal diet 2-3 days before the sugar examination, and not eat food with high fat or sugar content. 3. Patients should go to the hospital to draw blood once in a fasting state to determine blood sugar. Dissolve 75g of glucose powder into 300-400ml of water and drink it quickly. After drinking the sugar water for 1 hour and 2 hours respectively, the standard process of glucose tolerance test will be finished, and if the measured fasting blood glucose is greater than 7.0mmol/L or the 2-hour blood glucose is >11.1mmol/L, the diagnostic criteria of diabetes will be met.