1. The research question is not important or novel enough: the reviewer may think that the research question has no substantial contribution, or there have been many similar studies. In this case, the author needs to re-examine the research question to ensure that it is innovative and important enough.
2. Improper research methods: The reviewers may think that there are problems in the author's research methods, such as insufficient sample size and unreasonable experimental design. In this case, the author needs to improve the research methods to improve the reliability and effectiveness of the research.
3. Problems in data collection and analysis: The reviewer may think that there are problems in the author's data collection and analysis, such as poor data quality and incorrect statistical analysis methods. In this case, the author needs to revise the process of data collection and analysis to ensure the reliability of the results.
4. The structure and writing quality of the paper are poor: the reviewer may think that the structure of the paper is chaotic, the logic is unclear, or the writing quality is not high. In this case, the author needs to revise and improve the paper to improve its readability and persuasiveness.
5. Insufficient or inaccurate references: The reviewer may think that the author's references are insufficient or inaccurate, resulting in a lack of support for the paper. In this case, the author needs to supplement and modify the references to ensure that the views of the paper are fully supported.
6. Failure to meet the publication requirements of the journal: the reviewer may think that the paper does not meet the publication requirements of the journal, such as the format does not meet the requirements and the length is too long. In this case, the author needs to revise the paper to meet the publishing requirements of the journal.