学生上学必须携带书包。但怎样携带书包及携带多重的书包才不至于影响学生的生长发育,对这个问题,以往没有引起学校及家长的重视。为此,1990年11月,我们对城关小学1～6年级349名小学生的书包进行了卫生学调查。 1 调查对象、方法和内容 1.1 对象本次对6个年级的在校学生各抽查1个班,共349名。其中男生181名,女生168 Students must bring school bags to school. However, how to carry school bags and carrying multiple school bags will not affect the growth and development of students. This problem has not drawn much attention from schools and parents in the past. To this end, in November 1990, we carried out a hygiene survey on the schoolbags of 349 primary school students in grade 1 to grade 6 in Chengguan Primary School. 1 Subjects, Methods and Contents of the Survey 1.1 Subjects This course examines one class of 349 students in each of the six grades. 181 boys and 168 girls