Diabetic patients screening preparation: 1, first of all, diabetic patients in the screening before 3-4 days, the diet as light as possible, do not eat a lot of sweets or eat a lot of snacks and fried food, which will also interfere with the results of the examination; 2, patients should be from the examination of the first day after ten o’clock in the evening do not eat or drink, the next morning after six o’clock to ensure that the fasting eight hours after fasting state, so that the results of the blood extracted laboratory tests are more accurate, on behalf of the patient’s true fasting state of blood glucose; 3, if the patient needs to do the glucose tolerance test, need to be prepared for the test of 200-300 ml of mineral water.