英语易混淆词汇辨析：alert, cautious, considerate

you have a choice in how you behave towards others. you can be generous, considerate and caring to the people around you or you can be selfish, self centered and always put your own interests first.
你可以选择如何对待别人.你可以是慷慨的,周到的和关怀的对待你周围的人,也可以是自私的,自我为中心的,并且常常把自己的兴趣放在首位.