This simple approach, of dividing the decision space up into boxes, can be represented by what’s called a decision tree, which would look like this pictorially or could be written in code using If-Statements, like this.

这种将决策空间划分为多个框的简单方法可以用所谓的决策树来表示，它在图形上看起来像这样，或者可以使用 If 语句用代码编写，如下所示。