宝山区作为上海的近郊区，近年来流动人口数量增长迅速。
北京中医医院现有急救站点130个，其中远郊区县63个。
1·Review history, the United States, advanced nation of the western has gone through repetition and change many times in the course of the construction of city suburban district.
回顾历史，以美国为首的西方先进国家在城市郊区的建设开发历程上，经历了多次的反复与变更。