第一讲小学生的身心发育特点与营养入小学学习至１２岁小学毕业为小学学龄期儿童，或称小学生。这一阶段儿童体格生长速度较前更趋平稳，较少患病。体重每年约增加２千克，身高每年增长５．８厘米—６．５厘米。但到小学高年级即五六年级（１０—１２岁）时，部分儿童已进入青 First, the physical and mental development of pupils and nutrition characteristics of primary and secondary learning to 12-year-old primary school for primary school-age children, or primary school students. During this period, the physical growth rate of children was more steady and less sick. Weight increased by about 2 kg per year, height increased 5.8 cm -6.5 cm per year. However, by the fifth and sixth grades of primary school (10-12 years old), some children have entered the youth stage