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儿童生长速度可以客观而敏感地反映儿童近期生长和营养状况，生长速度在儿童生长发育评价中、在早期发现儿童生长障碍及体育人才选拔中是不可缺少的指标。因此儿童生长速度的研究和儿童生长速度标准的制定受到国内外专家的广泛关注。由于横剖面调查不能提供生长速度个体间变异?
The growth rate of children can objectively and sensitively reflect the recent growth and nutritional status of children. The growth rate is an indispensable indicator for early detection of children’s growth disorders and the selection of sports talents in the evaluation of children’s growth and development. Therefore, the study of children’s growth rate and the development of children’s growth rate standards have drawn wide attention from domestic and foreign experts. Because cross-sectional surveys do not provide an individual-to-individual variation in growth rate?