On the issue of fasting and water for physical examination, it is best not to eat or drink after 10 pm the night before the physical examination. The normal requirement for physical examination is fasting for at least 8 hours, if the fasting time is not enough, it will affect the accuracy of the physical examination results, which will directly affect the indicators of blood, such as blood lipids, blood sugar and some biochemical indicators of blood changes, as well as the abdominal ultrasound examination. At the same time, it is recommended to eat as light as possible the night before, eat easily digestible food, such as porridge, noodles and other relatively well-digested food, and do not eat too much. If you are too full or consume foods that are too greasy or too sweet. The triglycerides, cholesterol, LDL cholesterol, etc. and blood sugar in the blood test the next day will be affected to varying degrees and may be elevated for a short time. Do not drink too much alcohol. If you drink too much alcohol the night before, it will affect the liver function in the blood test and the transaminases will be elevated to varying degrees. Because alcohol is metabolized by the liver and kidneys, excessive alcohol consumption can impair liver function and cause a transient increase in liver transaminases, which can affect the normal test results.