Clinical diseases requiring surgery are often patients with severe infections, neoplastic lesions, and trauma, as follows: i. For patients with acute suppurative appendicitis and acute gangrenous cholecystitis, severe infection of the abdominal cavity often occurs, causing severe abdominal pain, accompanied by fever, chills, and other manifestations of systemic toxicity, requiring surgical removal of the gallbladder or appendix. After clearing the patient’s infection, the symptoms can be relieved more quickly. Second, for patients with malignant tumor of stomach and malignant tumor of liver, it is necessary to perform surgical resection as soon as possible to avoid extensive spread of tumor and prolong the life of patients as much as possible. Third, for fractures of the limbs caused by car accident injuries, it is often necessary to perform surgical internal fixation as soon as possible to solve the problems of bleeding caused by fractures and joint mobility disorders.