顾炎武作为明清之际的重要学者，受到时代风气与晚明出版业繁荣的影响，治学范围相当广泛。而其晚年的北游经历，则对其学术研究产生了促进和限制的双重作用，与同时代的著名学者黄宗羲相比，呈现出独有的特色。%Gu Yanwu was one of the most important scholar between Ming and Qing Dynasty. Under the influence of period atmosphere and his travelling experience in the north China in his later years, Gu Yanwu's study field was very extensive. Particularly, the travelling experience both promoted and limited his study. Compared to Huang Zongxi, a famous scholar lived in the same period with Gu Yanwu, Gu's research showed some special features.
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