若建立3个乘车点，为使教师和工作人员尽量满意，至少需要安排多少辆车？给出每个乘车点的位置和车辆数。假设每辆车最多载客45人（假设车只在起始站点载人）。-If you create a three-point ride, as far as possible so that teachers and staff satisfaction, at least need to arrange how many cars? The number of points given for each car