都市人总在东迁西移,同样看着邻边那户人家此时来、彼时去。在流动性极高的社会,“邻里”二字从都市生活中逐渐褪去,导致人们面对陌生人时难免心存忌讳。或者从美国匹兹堡身上,我们可得到一点反思。自十九世纪开始,这个“移民 Urban people always move in the east, while watching the other side of the same family at this time, then go. In a highly mobile society, the word ”neighborhood“ gradually faded from urban life, causing people to avoid being taboo when faced with strangers. Or from Pittsburgh, the United States, we can get a little reflection. Since the nineteenth century, this ”immigrants."