Directions: Write an English composition according to the instructions given below in Chinese.
复旦大学一研究生因平时琐事和同学不和，在寝室饮用水里投毒，导致一室友死亡。作为即将踏入大学校门的你，谈谈和同学和谐相处的重要性以及你的一些建议。
注意：1. 词数不少于120个；
2. 不能使用真实姓名和学校名称,
3. 文章开头已给出, 不计入字数。
A graduate of Fudan University didn’t get on well with his roommates for trivial. So he put some poison in the drinking water, killing one of his roommates.