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为了考核课间餐对促进学生身体发育、提高学习能力的效果,1985年4～7月,我们对有课间餐的钟山镇第二小学(试验组)和经济条件相近,但无课间餐的第一小学(对照组)进行了调查对比。镇二小学全校实行课间加餐,其营养素人均供给热量285千卡,约占全日供热量标准2200～2300千卡的13～14%,蛋白质人均供给量为9克,占全日供给标准60克的15%。试验组和对照组各选一年级一个班作身高、体重的测定,加餐三个月前后各测一次,以比较形态发育的差异。另选三年级3个班作
In order to assess the effect of inter-meal meals on promoting students’ physical development and learning ability, from April to July 1985, we found that the second primary school (experimental group) of Zhong Shan Town with meal time was similar to the economic conditions, but no interscholastic The first primary school meal (control group) conducted a survey comparison. The town of two primary schools throughout the school plus meals, the nutrients per capita supply of heat 285 kcal, accounting for about full-day heat supply standard 2200 ~ 2300 kcal 13 to 14%, protein per capita supply of 9 grams, accounting for full-time supply standards 60 15% of grams. Test group and control group of the first grade of each selected a class for height and weight determination, meal inspection three months before and after each test to compare the differences in morphological development. Another third grade three classes