1.Gallbladder and pancreas: For gallbladder ultrasound examination, you should eat less fatty food the day before, and you should not eat 8 hours before the examination (i.e. after dinner the day before the examination). If the gallbladder does not show up and needs to be reexamined, fatty foods must be abstained from 24-48 hours. If the patient has to undergo X-ray of gastrointestinal or gallbladder at the same time, ultrasound should be scheduled before them or after three days of barium gastrointestinal meal and two days of cholangiogram. Preparation for pancreatic examination is the same as that for gallbladder. 2.Spleen: No special preparation is needed for simple examination of the spleen, but after a full meal, the spleen is shifted to the upper back, which affects the image, so an empty stomach is preferable. 3, gastrointestinal: for gastrointestinal and other upper gastrointestinal examinations, easily digestible food should be eaten the night before, and fasting and water should be prohibited in the morning of the examination. If patients need to do gastrointestinal X-ray or fiberoptic endoscopy at the same time, ultrasound examination should be arranged before them or 2-3 days after them to avoid the interference of barium and gas. For rectal examination, the patient must keep the bladder full, so he should not urinate 2-3 hours before the examination. Before the colon examination, attention should be paid to the emptying of the bowels. 4, retroperitoneal organs: the same preparation as the gallbladder. If it is necessary to distinguish whether the lesion is in the pelvis, the bladder should be kept full before the examination. Do not make barium contrast two days before the examination. 5.Liver and kidney: No special preparation is generally needed before the examination, but it is best to do it on an empty stomach. 6.Obstetrics and gynecology: you should stop urinating 2-3 hours before the examination and drink 500-800ML of water if necessary, making sure to make the bladder feel inflated. If it is in the early stage of pregnancy, it is not necessary to drink water to avoid overfilling of the bladder and pressure on the uterus. In case of transvaginal ultrasound, there is no need to drink special water. 7. Eyes: The examined eye will be closed during the examination, and the non-examined eye will be looking flatly at the ceiling, with the jaw slightly upturned so that the pupil is located in the center. Do not rub the eye during the examination to avoid the oily liquid used for the examination from flowing into the eye and damaging it. Young children may be uncooperative during the ultrasound examination and should be sedated in advance. For abdominal organ examination, in case of excessive gas in the abdomen or constipation, the doctor may instruct the patient to take laxatives the night before the examination or give an enema before the examination.