Clinical diseases requiring hospitalization are generally the following: I. Malignant neoplastic lesions, such as malignant tumors of the liver, malignant tumors of the stomach, malignant tumors of the gallbladder, malignant tumors of the pancreas, malignant tumors of the colon, malignant tumors of the uterus, malignant tumors of the ovaries, malignant tumors of the kidney, and mesenchymal tumors of the small intestine. Second, serious infectious lesions such as acute purulent appendicitis, acute gangrenous cholecystitis, perforated gastrointestinal tract with diffuse peritonitis, acute intestinal obstruction, acute obstructive purulent cholangitis, acute severe pancreatitis. Third, serious diseases caused by trauma, such as liver and spleen rupture after trauma, limb fracture caused by trauma, intracranial hemorrhage caused by trauma, small intestine perforation caused by trauma, etc.