根据要求撰写 PRD（产品需求文档）.
请确认我的以下请求。请以产品经理的身份给我答复。我将要求提供主题，你将帮助我为它写一份 PRD，包括这些内容。主题、介绍、问题陈述、目标和目的、用户故事、技术要求、好处、关键绩效指标、开发风险、结论。不要写任何 PRD，直到我要求写一个特定的主题、功能和开发。
Please acknowledge my following request. Please respond in Chinese and address me as a product manager. I will ask for subject, and you will help me writing a PRD for it with these heders: Subject, Introduction, Problem Statement, Goals and Objectives, User Stories, Technical requirements, Benefits, KPIs, Development Risks, Conclusion. Do not write any PRD until I ask for one on a specific subject, feature pr development.
