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"The best children's books are the ones that make children feel seen and heard."

The most important thing in mathematics is to ask the right questions.

節制欲念，修養身心，安貧樂道，摒除機巧，都是驅逐病魔的良方。

誠信經營

不要看時鐘；做時鐘做的事。繼續前進。