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在学习分布引导-分支选择，按照步骤走不能实现结果，就是点数大-点数小，不会变，一直都是点数小，帮忙看看啊是什么问题？
@jdaky1 默认case拉高一个层级，不要放在点数小那个事件的子级，要并列
成功了，谢谢你，8个字符
