代码重构：它没有直接甩代码，而是先思考了“设计模式”的选择（工厂模式 vs 策略模式），最终选择了适合扩展的策略模式。
2026-02-28 12:002026년 2월 28일 12시 00분
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Here's the insertion algorithm in Python. Step through the code and watch each line execute on the tree: