在NLP的层次模型中，哪个层次主要关注个体的具体行为？

在Java中，switch语句的default分支的作用是什么？

为什么说简单的因果陈述可能存在局限性？

下列哪一项描述了二叉树中结点的链域数量？

A historical account notes, 'The treaty, while aiming for long-term peace, inadvertently created new tensions by failing to address fundamental economic disparities.' What is the primary relationship established between the treaty's aim and its outcome?