改变的大小和需要付出的努力应该大致成正比。

请你根据以下提示，并结合事例，用英语写一篇短文。

We often hear people say, “Life is hard!” Faced with difficulties and even failures in life, people’s attitudes are different. Some feel optimistic(乐观的) while others do not. Do be optimistic in your school life.

注意：①无须写标题，不得照抄英语提示语；②除诗歌外，文体不限；③文中不得透露个人姓名和名称；④词数不少于120。