[简答题]不同的人对“幸福”有不同的定义。什么是幸福健康的人相对于有病的人来说是幸福；有钱的人相对于穷光蛋来说是幸福。因此，幸福不能用一个标准来衡量。有人认为，人活着就是幸福。因为只要活在这个世界上，就可以感受到世界的万千变化，就能做自己想做的事情。现在，很多人的生活水平提上来了，然而幸福指数(sense of happiness)却下降了。我们常常看到的风景是：一个人总是仰望和羡慕着别人的幸福，一回头，却发现自己正被仰望和羡慕着。

参考答案: Different people may have different concepts on "happiness". What is happiness For people troubled with disease, good health is happiness. For people in poverty, wealth is happiness. Therefore, there’s no single standard on happiness. Some people believe that life is itself happiness. Because so long as one lives in this world, one can feel varieties of changes in the world, and can do what is to be done. Nowadays, a lot of people’s living standards are improved, but their sense of happiness has declined. Things often occur that one may envy and long for the happiness of other people, but at some time of new situation, one’s own life is something envied and pursued after by other people.