近年来我国城乡居民的膳食状况明显改善,儿童青少年平均身高增加,营养不良患病率下降。但在贫困农村,仍存在着营养不足的问题。同时,我国居民膳食结构及生活方式也发生了重要变化,与之相关的慢性非传染性疾病,如肥胖、高血压、糖尿 In recent years, the dietary conditions of urban and rural residents in China have obviously improved. The average height of children and adolescents has increased while the prevalence of malnutrition has dropped. However, in poor rural areas there is still a problem of under-nutrition. In the meantime, important changes have taken place in the dietary patterns and lifestyles of our residents. The related chronic non-communicable diseases such as obesity, hypertension, diabetes