In the next place, it summarizes research result and existent problems of the three literary works in our country, and comes up with purpose and significance of writing thesis.
其次综述国内对这三部文学作品的研究成果及存在问题，并提出论文的写作目的及意义。
This paper summarizes the status quo and distribution of three categories of environment-geological problems of the mines in the southwest region of China, and several control measures were proposed.
本文总结了西南地区三大类型矿山环境地质问题的现状与分布规律，并在此基础上提出了防治对策与建议。
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