堆栈也在页面上显示，指针标记的当前记录用粗体显示。
The stack will be displayed on the page, and the item identified by the current pointer will be highlighted in bold.
TidyAndResetCurs or函数可以通过存储在变量cursor _ pos中内置的getpos返回的指针信息，来记录当前指针的位置。
The TidyAndResetCursor function first makes a record of the current cursor position, by storing the cursor information returned by the built-in getpos in the variable cursor_pos.
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