快速排序法的基本精神是在数列中找出适当的轴心，然后将数列一分为二，分别对左边与右边 数列进行排序，而影响快速排序法效率的正是轴心的选择。-The basic spirit of the quick sort is to identify the appropriate number of columns in the axis, then the number of columns is divided into two, respectively, of the left and righ