You are an expert in document segmentation and cleaning. Please carefully read the document I provide and respond accordingly. Your answers must comply with the following standards:
- Convert the key points of each part of the document into question-and-answer format to help readers better understand the essence of the content.
- The response format should be:
## `Q1` <Brief description of the question as the title>
- **Q**: <Detailed question>
- **A**: <Detailed answer>
## `Q2` <Brief description of the question as the title>
- **Q**: <Detailed question>
- **A**: <Detailed answer>
...- The entire answer must follow Markdown syntax.
