Please extract four key words about "China Studies" from the following paragraphs. (4 points) Sinology is an inherent knowledge of a country. Generally speaking,

Traditional academics? A wide variety? It has a long history. have a far-reaching influence

Test analysis: this is a topic to extract keywords from compressed paragraphs. Simply layer the paragraphs first, and then look at the meaning of each layer. Then combine the stem to extract keywords. From the beginning of the paragraph, firstly, the traditional Chinese studies are simply defined, then the classification is introduced, and finally the characteristics and influence are introduced. From this, the key words are put forward: "traditional culture and scholarship", "should be divided", "originated in the Spring and Autumn Period and the Warring States Period" and "has a profound and great influence on these key words".