By querying the information of Ivy League papers, the content of each paragraph is blank, which is the format of the general text. The word "abstract" is written in bold, centered on the third word, with two spaces between "abstract" and "important", and the content is in song style on the fourth smallest.

At the end of the abstract, write a line of keywords. The key words and text of the abstract should be written separately. Three keywords are written in small four-character bold, usually three to five. The English abstract should correspond to the Chinese abstract, and the font should be small four characters.