Imagine living in a city where you felt safe walking home at ten in the evening - or even at two in the morning.

• 设想一下,如果你居住的城市治安状况良好,当你在晚上十点钟、甚至在清晨两点钟独自一人步行回家时,心里毫无恐惧感,你的心情是否会变得好得多?