One possible version:

Dormitory life is regarded as an important part of school life. A harmonious dormitory life is of great significance to students’ study and emotion as well. Only in a condition where nothing annoying exists can we put our heart and soul into study. Besides, a dormitory life filled with harmony can promote mutual understanding, helping building up a good relationship between roommates.

In order to maintain a harmonious dormitory life, we should form a healthy style and try to get rid of the bad habits, if there are any. Additionally, when an annoying situation arises, we need to communicate sincerely with or tolerate each other and co-exist. Moreover, we’d better share happiness and sorrow with each other so as to lay a solid foundation for mutual understanding.

题目分析：本文是篇材料作文，对此话题考生非常熟悉，应该有话可说。考生在写作之前必修认真审题，首先要注意文章的时态，要求是对构建“和谐宿舍生活”的重要性进行阐述及如何构建 “和谐宿舍生活”提出建议，所以要用一般现在时。其实本篇书面表达的开放程度还是蛮大的。题目中所列的两点“阐明和谐宿舍生活的必要性”和“提出建议”都需要考生自拟。因此在自拟要点时，考生要注意围绕主题去联想和展开。

【亮点说明】范文使用了非常好的短语和句子为文章增色不少，比如significance，emotion, as well, promote mutual understanding, maintain a harmonious dormitory life get rid of the bad habits等。倒装句“Only in a condition where nothing annoying exists can we put our heart and soul into study”以及状语从句“if there are any”“when an annoying situation arises”的运用更是锦上添花。此外非谓语动词“helping building up, In order to maintain a harmonious dormitory life, try to get rid of ,so as to lay a solid foundation for mutual understanding.”的使用更显作者语言运用的功力。作者还注意了上下文的衔接：“Besides,，Additionally, Moreover”等等的使用使文章顺畅连贯。