通过身体运动表达资源体验，这属于下列哪种方法？

在心理治疗中，帮助患者认识到内心冲突对生活的影响，主要是为了实现什么目标？

在等差数列中，若第一项为3，公差为2，则第10项是多少？

A research study aims to investigate the impact of a new educational program on student performance. The study involves two groups of students: an experimental group that participates in the new program, and a control group that follows the traditional curriculum. If a pre-test is administered to both groups to establish a baseline for performance, what is the most important reason for random assignment of students to the two groups?

在深度优先搜索（DFS）算法中，通常使用哪种数据结构来辅助实现？