现代都市，楼房鳞次栉比，人流摩肩接踵。有人说这样的环境极为有利于人们扩大交往，但也有人喟叹都市人的“生理距离不能再短，心理距离不能再长”。如果是说社区居民间出于尊重隐私等原因而来往不多，或者为居家安宁而不愿与邻居交往，以致“住在对门不知姓，天天见面不相认 Modern city, row upon row of buildings, crowds of people. Some people say that such an environment is very conducive to people to expand contacts, but some people lament the urban people’s “physical distance can no longer be short, the psychological distance can no longer longer.” If it is said that residents of the community out of respect for privacy and other reasons come and go, or for the peace of the home and do not want to associate with their neighbors, so "live in the door I do not know surname, meet every day do not recognize