As far as I am concerned, education is about learning and the more you learn, ______. [ ]

A. the more for life are you equipped

B. the more equipped for life you are

C. the more life you are equipped for

D. you are equipped the more for life

在先左后右的原则下，根据访问根结点的次序，二叉树的遍历可以分为三种：前序遍历、 【1】 遍历和后序遍历。