Both functions walk the tree in depth-first order but they differ in whether a node is visited before or after its children.

这两个函数均按照深度优先的顺序遍历树，但两者的差异在于先访问一个节点还是先访问其子节点。

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In other words, instead of going depth-first (to the children), it goes through the adjacent elements.

换句话说，它没有选择深度优先(到达子代)，而是遍历相邻元素。

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In the Search Depth field, select the "Search only direct children of a path" option.

在Search depth字段中，选择“Search only direct children of a path”选项。

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