第126到146行通过适当调用“添加”、“查找”和“关闭”函数来对用户操作作出反应。

Lines 126 to 146 react to user actions, calling the add, find, and close functions, as appropriate.

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添加和删除操作的开销是很大的，只主要是因为对半查找树的平衡性所决定的。

Add and Remove operations are typically expensive since Binary Search Trees require that a tree be balanced.

youdao

通常，您可以通过添加- a和- h命令行选项来查找更详细的信息。

You can often find out more detailed information by adding the -a and -h command-line options.

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