First of all, judging from the format of the article, the text can't be written directly after the third-level title, and it should be written in another place. The specific explanation is that the titles below the second level in the paper are italicized and arranged every other word. If the second-level title is followed by the third-level title, the third-level title will start on another line, and the text will be arranged one word apart, and so on.

Format of document body:

In order to achieve the purpose of clear hierarchy and clear context, the text is often divided into several large paragraphs. These paragraphs are called logical segments, and a logical segment can contain several small logical segments, and a small logical segment can contain one or several natural segments, so that the text forms several levels. The level of the paper should not be too much, generally not more than five levels.

In order to reflect the scientific basis of the article, the author should respect the seriousness of other people's research results and provide readers with the sources of relevant information. Generally, a list of references should be listed at the end of the text.