Reflection

Revisiting NYC after a decade revealed a massive luxury head market supported by high population density, wealthy residents, and tourist spending mindset—explaining the SUVs and flagship stores.

Builder's Mindset是AI时代的关键思维模式，从被动的工具使用者转变为主动的工具构建者，释放AI的真正潜力。

Builder's Mindset is the key to unlocking AI's full potential—shifting from passive tool user to active tool builder in the AI era.

反思为何正确性不是思考的核心目标，提出真正重要的是纲举目张（Prioritization）、举一反三（Connection）和知行合一（Verification）三种能力。

视频信息密度低、不可检索、难以跳转，但up主赚大钱而写文章不赚钱。核心在于视频让"作者"站到前台，观众更容易产生情感连接和付费意愿。

Videos are terrible for learning—can't skim, search, or navigate easily. Yet creators make millions because video makes the "author" tangible, lowering the barrier to payment. Articles hide the author behind ideas.

对比三种写课程介绍的策略：完全AI、AI辅助、完全人肉。发现人类写作自然流露的张力与感染力是AI外交式疏离风格所缺乏的，选择不用AI本身也是对用户的尊重。

Compares three approaches to writing a course introduction—fully AI, AI-assisted, and fully human. Reveals that human writing conveys tension and engagement that AI's diplomatic, detached style lacks, and choosing not to use AI can itself show respect to users.

ChatGPT的优势与弱点分析，GPT范式革命的深层思考：理解一个东西的最好方法是去生成，以及AI定义随人类能力变化的讽刺。

音频碎碎念之D类放大器：利用数字电路实现高效率放大，详解PWM调制、bus pumping、负反馈延迟、电磁干扰等独特挑战与解决方案。