考虑每个区的乘车人数，使工作人员和教师的满意度最大，该将校车点应建立在哪N个点，建立一般模型，并给出N=3，4时的结果。-Consider the number of passengers in each area, so that the staff and faculty satisfaction largest school bus that will be built on the spot where N points, the establishment of the general model, and the results are given N = 3,4 when.