百度地图开发实战案例:展示当前定位多少千米内的POI（兴趣点）

    //半径10千米,可自行调整;
    var circle = new BMap.Circle(mPoint, 10000, {
        fillColor: "blue",
        strokeWeight: 1,
        fillOpacity: 0.3,
        strokeOpacity: 0.3
    });
    map.addOverlay(circle);

    //POI数据;
    var local = new BMap.LocalSearch(map, {
        renderOptions: {map: map, panel: "lists"},
        pageCapacity: 10
    });
    local.search("医院");