What the program will end up doing is calculating both answers, and then using a conditional instruction to select the desired answer.
这个程序最终要做的是计算两种答案，然后使用一个条件指令来选择所需要的答案。
Readers suggested clever naming conventions that would select a style sheet, but the best suggestion for a solution came from a colleague who reminded me of the xml-stylesheet processing instruction.
读者建议用巧妙的命名约定来选择样式表，但对于解决方案的最好提议来自一位同事，他提醒我使用xml - stylesheet处理指令。
The instruction takes one attribute called select with a path to the RSS or Atom element that you're interested in.
该指令接受一个称为 select 的属性和您感兴趣的 RSS 或 Atom 元素的路径。
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