排序通过对树项目进行迭代(第37 - 39行)来执行。

The sorting is performed by iterating through the tree's items (lines 37 to 39).

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for 循环在 string 列表上进行迭代，一次输出一行。

The for loop iterates over the list of strings, printing them out one at a time.

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使用函数odbc_result，该函数接受结果集和列名称(字符串形式)，并返回行迭代程序所指向的行中的单元值。

Use the function odbc_result , which takes in a result set and a column name (as a string) and returns the cell value within the row that the row iterator points to.

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