How to extract the central idea of the article

Refining the central idea of an article usually requires the following aspects: 1. An abstract is a brief summary of the main content of the article. Generally, it does not exceed 250 words. The abstract should be concise and express the core ideas and conclusions of the article so that the reader can quickly understand the main content of the article. 2. Keyword: The keyword is to list the keywords that appear in the article to help readers better understand the content and theme of the article. The selection of keywords should be based on the topic and content of the article. 3. Thesaurus: The Thesaurus is a summary of all the vocabulary that appears in the article, listing the subject and content-related vocabulary of the article. Thesauri can help readers better understand the content and theme of the article and also help authors better organize the structure of the article. 4. The conclusion is a summary of the main points and conclusions of the article. It is usually the end of the article. The conclusion should be concise and express the core ideas and conclusions of the article so that readers can better understand the main idea of the article. Introduction: An introduction is a brief introduction to the background and purpose of the article. It is usually the beginning of the article. The introduction should be able to attract the reader's interest and guide the reader to understand the main content and background of the article. Through the analysis of the above aspects, we can better understand the central idea of the article and extract it.