营养不良是指营养物质的全面缺乏,以至能量不足,不能维持正常代谢而造成的一种全身性消耗性疾病。是发展中国家儿童的常见病,也是发达国家中住院儿童常见的合并症。营养不良患儿防御功能减低,易感性和病死率增加,甚至轻度营养不良也可使机体免疫功能下降,因此,正确供给营养是保证儿童健康的关键。 Malnutrition refers to a complete lack of nutrients, and even lack of energy, can not maintain normal metabolism caused by a systemic wasting disease. Is a common disease in children in developing countries and is a common complication of hospitalized children in developed countries. Malnourished children with reduced defense function, increased susceptibility and mortality, and even mild malnutrition can also make the body immune function decline, therefore, the correct supply of nutrition is to ensure the health of children’s key.