你是否有过难以入手做某事的经历？
在阅读习惯方面，存在着中老年读者传统阅读习惯难以改变的问题，应从阅读舒适度入手，争取中年以及中年以上的阅读群体的参与；
In regard to reading habits, it's difficult for elder people to change traditional reading habits. Therefore, efforts should be made to increase comfort so as to attract the elder group.
文章从矿山环境恢复治理存在的矛盾入手，从生产外部性、科斯定理、生产理论、博弈论四个方面，详细分析了矿山环境难以治理有其深刻的经济学根源。
There are some conflicts in mine-environment governance. The paper analyses detailedly economics root of mine-environment puzzle from externalities, Coase Theorem, production theory and game theory.
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