Then we have to calculate how many words there are in the first few items and how many words remain to be written. Before writing the text, we should build an overall framework of the paper, but we should not completely stick to the established structure and rigid framework. Focus on the analysis of the key points of the paper and refine the description; The second key content briefly explains that there should be no "distracted guests", which leads to the phenomenon that the research focus is not clear. In fact, when writing the text, try to write in detail. It doesn't matter much if there are more words, but it will be troublesome if there are not enough words.