1. Content: The general discussion usually includes a comprehensive summary and generalization of the follow-up discussion, which plays the role of an outline. An overview is a detailed description of a specific topic, providing more detailed information.
2. Use: The general introduction is usually located at the beginning or end of the paper to guide or summarize the full text. It is mostly used in the middle narrative part of the paper, aiming at making readers have a more comprehensive understanding of the theme.
3. Significance: The abstract plays the role of summarizing and generalizing the full text, so that readers can quickly understand the main contents and viewpoints of the article. The overview is more specific, providing detailed information and descriptions of specific topics.
Generally speaking, the general introduction is a summary and generalization of the overall situation of the article, while the general introduction provides detailed information and description for specific topics. Both of them have their own unique uses and significance in thesis writing.