如何灭绝美国人？

I live in Washington DC, the capital of the United States. I often meet and communicate with American politicians. Therefore, we will discuss a desperate topic: Is the extinction of Americans theoretically feasible? The answer is yes. So, I wrote this book and answered the feasible plan to exterminate Americans. 我生活在美国的首都，华盛顿市。我时常与美国政客见面和交流。因此，我们会讨论到一个令人绝望的话题 灭绝美国人，在理论上可行吗？答案是，可行的。于是，我写了这本书，解答了灭绝美国人的可行性方案。