阅读下面短文，然后按要求写一篇150词左右的英语短文。
SHANGHAI --- Police in Shanghai have asked a district procurator（检察官）to approve the arrest of a postgraduate student who admitted having killed his roommate by poisoning him.
The suspect, a man surnamed Lin, who is attending medical school at Fudan University, held a jealousy against his 28-year-old roommate Huang Yang over a trivial thing and planned the poisoning, an initial police investigation showed.
Lin took a deadly chemical compound from a university lab and used it to contaminate the water dispenser in their dormitory at noon on March 31, the investigation showed.
Huang, a third-year medical postgraduate student at Fudan University, showed poisoned symptoms after drinking water from the dispenser on April 1 and was pronounced dead due to multiple organ failure on April 16.
【写作内容】
1. 以约30词概括短文的大意;
2. 然后以约120词就“同学之间该如何相处?”为主题发表看法，并包括如下要点：
（1）同学之间因成长环境、家庭教育和性格等的不同存在很大差异；
（2）在相处时发生冲突（conflict)的原因：如遇事不够冷静、为小事争吵等;
（3）同学之间应该如何相处。
【写作要求】
1. 可以使用实例或其它论述方法支持你的论点，也可以参照阅读材料的内容，但不得直接抄袭原文中的句子；
2. 作文中不能出现真实姓名和学校名称。
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