立体几何是一个古老而又严谨的学科,不少学生感到困难而畏惧之.自从向量尤其是空间向量被引入高中课程后,大大减少了立体几何中因证明而带来的困难,其中灵活 Solid geometry is an ancient and rigorous discipline, and many students feel difficult and fearful. Since vectors, especially space vectors, have been introduced into high school courses, the difficulties caused by proof in three-dimensional geometry have been greatly reduced.