希望能够将如下文本改写成更加正式、专业的表达：
I really enjoyed the presentation you gave last week. There were a few things I had questions about, though. First of all, I'm not sure about the data source for your projections. Can you provide more detailed information on that? Secondly, I'd like to understand more about the methodology you used for your analysis. Any additional details you could share would be really helpful. Thanks for your time and guidance!
user
我非常欣赏您上周的演讲。然而，针对其中的一些内容，我有一些疑问。首先，我对于您预测所采用的数据来源尚不明确，能否提供更详细的说明？其次，我希望进一步了解您在分析中所使用的方法论。若能分享更多相关细节，将对我有很大帮助。感谢您的时间和指导！
assistant