The paper needs to be summarized, and there are different arrangements according to the nature of the paper. For short papers, such as those to be published in general magazines, the abstract is placed directly in front of the paper. For dissertations, such as master's dissertations or doctoral dissertations. Due to the large content and long length of the paper, if there is an overview in front, it is obviously insufficient. Therefore, the introduction is generally used at the front of the paper, not an overview. However, there should still be an overview in the dissertation, and there are relatively many, that is, an overview can be put in front of each chapter or even some chapters, mainly introducing the main contents of the chapter or chapter. Of course, for smaller chapters, there is often no need to summarize in front, that is to say, not every chapter needs to be summarized in front, only the chapters are longer and have more content. As for completing a whole or a paper, in order to deepen people's understanding of the chapter or the paper, conclusions, sections or abstracts can be used at the end of the chapter or the paper.