考察一下环境情况：早上、下午、工作日以及周末的情况,找一个最差和最佳的时辰去看看,多去看几次就可知附近是否有火车、学校或很繁忙的交通。

• study area conditions morning, afternoon, weekday, weekend. See it at its worst time, and best. By making numerous visits to the flat or house, you will learn if there are trains or schools or very heavy traffic nearby.