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1988年元月,我们在保康县城关镇随机对89名学生的家庭晚自修照明和桌椅进行了卫生学调查。 1 调查方法使用校正合格的上海嘉定光学联仪厂JD—IA型照度计和自制的课桌椅测量尺,于晚上7～9点钟深入学生家庭进行现场调查。测量方法及标准严格按照儿少卫生学要求进行。 2 结果与分析 2.1 照明情况:89名学生家庭晚自修的照明统计,合格21户,合格率为23.6％。23户是为学生学习专门设置的灯具,占25.84％;66户是让学生兼用室内全面照
In January 1988, we conducted a hygiene survey on the lighting of the 89 families of students and the chairs and tables in the town of Chengguan, Baokang County. 1 The survey method used a calibrated JD-IA type illumination meter of Shanghai Jiading Optical Cooperative Instrument Factory and a home-made desk and chair scale to go into the student’s family at 7 to 9 o’clock in the evening for on-site investigation. Measurement methods and standards are strictly in accordance with the children’s hygiene requirements. 2 Results and Analysis 2.1 Lighting: Lighting statistics of 89 students’ families in the self-study, qualified 21, with a pass rate of 23.6%. 23 households are specialized lamps for student learning, accounting for 25.84%; 66 households allow students to use the indoor full photo