今天人们评价事物,往往以“有用”和“无用”作为取舍的原则和裁量的标准。然而事物的发展,又往往印证了这是一种实用主义思维,它在让我们获得一片原野的同时,却遮蔽了更广阔的草原。鲁迅年轻时求学于水师学堂、矿路学堂和日本仙台医学专科学校,读了许多并非对专业有用的书,写 Today, people evaluate things, often “useful ” and “useless ” as the criteria for the choice of principles and discretion. However, the development of things often confirms that this is a pragmatic way of thinking. It allows us to obtain a field while at the same time obscuring a wider steppe. When Lu Xun was young, he studied at Naval Academy, Mine Road School and Sendai Medical College in Japan, and read a lot of books which are not useful to the profession.