What is the most important thing that patients should do before coming to the clinic? 1. It is very important to prepare all relevant previous examinations and visits! It can make the doctor save a lot of time and energy, and also make the patient himself save energy and money, so as to achieve a better diagnosis and treatment effect. 2, avoid preconceived ideas, especially for first-time patients, if from their own limited medical knowledge, it may lead to poor doctor-patient cooperation, can not comply with medical advice and affect the diagnosis and treatment. Instead, you should fully prepare all the information and ask your trusted doctor to do the examination and treatment. 3. When the condition is unclear, especially for gastroenterology patients, do not eat or defecate as much as possible to meet possible examinations. Such as liver function, abdominal ultrasound, stool routine, etc. 4.The correct view of gastroenteroscopy. These examinations are extremely helpful to gastroenterologists, and they help greatly in the understanding of the disease and comprehensive and effective treatment, but due to the patients’ fear and economic factors, they need doctors to do work to reluctantly agree to them. Here, we advise all patients that the fear of gastroscopy should be eliminated, and the examination should be seriously considered for middle-aged and elderly patients, as well as those who have black stool, wasting blood in stool, and abdominal masses with unexplained abdominal pain, and it is best in the early stage. 5, should be examined first and then take medicine or take medicine while examining, avoid asking the doctor to prescribe medicine first, so that the doctor is very difficult, it is likely to affect the examination and judgment of the disease, delay the disease and affect the effectiveness of treatment.