1. Out-of-date information: As it takes time to produce and disseminate documents, the information obtained through literature sorting and literature research may be out-of-date and cannot reflect the current actual situation.
2. Incomplete information: the generation and dissemination of documents are influenced by many factors, such as the author's knowledge level and the dissemination channels of documents. Therefore, there may be omissions or errors in the information obtained through literature sorting and literature research.
3. Subjectivity of information: the generation and dissemination of documents are influenced by the author's personal views. Therefore, the information obtained through literature sorting and literature research may be subjective.
4. Difficulties in information screening: Due to the huge number of documents, it may be difficult to screen information by literature sorting and literature research.
5. Lack of positivity: Literature collation and literature research mainly rely on the analysis of existing literature, lacking positivity, so the research results may be biased.
6. It is difficult to make quantitative analysis: the methods of literature collation and literature research mainly rely on qualitative analysis, and it is difficult to make quantitative analysis. Therefore, there may be some uncertainty in their research results.
7. Dependence on language and cultural background: The generation and dissemination of documents are influenced by language and cultural background. Therefore, when using literature sorting and literature research methods, we need to consider language and cultural differences.