1.How to regulate nutrition? The diet should be a general diet, semi-liquid, high protein, low salt and high fiber diet, small and frequent meals, do not overeat, limit smoking, alcohol, tea, coffee and stimulating food. 2.When should I take vaccination after surgery? Generally, after surgery, children can be vaccinated if their mental and physical strength have basically recovered (3-6 months), if they have no immune deficiency, and if they are not accompanied by other diseases. 3.What kinds of treatment methods are available for precocious heart disease? What is the difference? There are two kinds of treatment methods for congenital heart disease: surgery and interventional treatment. Surgical treatment is the main treatment method, which is useful for various simple congenital heart diseases (such as ventricular septal defect, atrial septal defect, arteriovenous ductus arteriosus, etc.) and complex congenital heart diseases (such as congenital heart diseases with combined pulmonary hypertension, tetralogy of Fallot and other heart diseases with cyanosis). Interventional therapy is a new treatment method developed in recent years, mainly for children with unclosed ductus arteriosus, atrial septal defect and partial ventricular septal defect that are not combined with other anomalies requiring surgical correction. The difference between the two is that surgical treatment has a wider scope of application and can cure all kinds of simple and complex congenital heart diseases, but it is traumatic and has a relatively long recovery time after surgery, and also leaves surgical scars that affect the aesthetics. Interventional treatment has a narrower scope of application and higher price, but it is non-invasive, with fast recovery and no surgical scars. 4.What is the best time for treatment of precordial disease? The best time for surgery depends on a number of factors, including the complexity of the congenital malformation, the age and weight of the child, and the general development and nutritional status of the child. Generally, for simple congenital heart, it is recommended to be 1-5 years old, because too young, low weight, poor general development and nutritional status will increase the risk of surgery; too old, the heart will compensate for the increase in size, and some may even have increased pulmonary artery pressure, which will also increase the difficulty of surgery and longer recovery time after surgery. For those with combined pulmonary hypertension, serious congenital malformations that affect growth and development, malformations that threaten the life of the child, or complex malformations that require staged surgery, the earlier the surgery the better, regardless of age.