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作者对居住在社会条件和人口统计因素相似而空气污染程度不同的两地区的四、五年级学龄儿童,进行了呼吸道症状和呼吸功能的检查。本调查在荷兰的威斯特兰进行,居民主要靠园艺和种花维持生活,花卉种植在上千个玻璃房里,绝大多数用油做保温燃料,一小部分地区近几年已被煤气所代替。烧油地区SO_2污染较高(以下称高污染区),烧煤气的地区SO_2污染已明显下降(以下称低污染区)。对两地区的五年级儿童和随机抽样
The authors conducted a review of respiratory symptoms and respiratory function in fourth and fifth grade school-aged children living in two areas with similar levels of social and demographic factors and different air pollution levels. The survey was conducted in Westland, the Netherlands. Residents mainly depend on horticulture and planting flowers. The flowers are planted in thousands of glass houses, with the vast majority of oil used as thermal insulation fuel. In a small part of the area, instead. Areas with high levels of SO 2 pollution in oil burning areas (hereinafter referred to as high-pollution areas) and SO 2 pollution with coal-burning areas have been significantly reduced (hereinafter referred to as low-pollution areas). Fifth grade children in both regions and random sample