American lifestyles show how much people respect the time of others. When people plan an event, they often set the time days or weeks in advance. Once the time is fixed, it takes almost an emergency to change it. If people want to come to your house for a friendly visit, they will usually call first to make sure it is convenient. Only very close friends will just "drop by" unannounced.
美国人的生活型态表现出他们对别人的时间有多尊重。当人们在计划一项活动时，通常会在几天或几个星期前把时间定好。时间一旦决定，除非情况紧急，否则不会轻易改变。如果有人想到家里拜访你，他们通常会先打电话过来，以确定你是否方便，只有很熟的朋友才会未经通知就突然造访。