程序一旦能工作了，你就应该把一些发挥『脚手架作用』的代码删掉，并且把重复的语句改写成精简版本，但尽量别让程序变得难以阅读。

Once the program is working, you might want to remove some of the scaffolding or consolidate multiple statements into compound expressions, but only if it does not make the program difficult to read.

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