怎么获取百度地图驾车路线api检索后的原始坐标

百度地图JavaScript API,驾车路线规划接口 DrivingRoute返回的起点和终点的坐标和原始坐标有偏差，怎么获取原始坐标

function GetMileage(p1, p2) {
            var searchComplete = function (results) {
                if (transit.getStatus() != BMAP_STATUS_SUCCESS) {
                    return;
                }
                var plan = results.getPlan(0);
                var start = results.getStart();//返回的起点
                var end = results.getEnd();//返回的终点
            }
            var transit = new BMap.DrivingRoute(map, {
                onSearchComplete: searchComplete
            });
            transit.search(p1, p2);
        } 

无报错

怎么获取检索后的原始坐标