Javascript 如何在“打开的图层3”中高亮显示选定的要素

现在，我正在使用这段代码从geojson数据库中缩放到下拉列表选择的功能。现在我想突出显示我选择的功能

function Zoomto(filter, SearchResultsLayer) {
var schoolname = $('#ddldistrict').val();
//// alert(districtname);
var filter = "schoolname='" + schoolname + "'";
$.ajax({
    url: owsURL,
    type: 'GET',
    contentType: 'application/json',
    dataType: 'jsonp',
    jsonpCallback: "parseResponse",
    data: {
        typeName: layerName,
        outputFormat: "text/javascript",
        service: "WFS",
        version: "1.1.0",
        request: "GetFeature",
        CQL_FILTER: filter

    },
    success: function (response) {

        var SearchResultsLayer = new ol.layer.Vector({
        });

        SearchResultsLayer.setSource(null);

        var searchresultssource = new ol.source.Vector({
            features: (new ol.format.GeoJSON()).readFeatures(response, {
                featureProjection: "EPSG:3857"
            })
        });

        SearchResultsLayer.setSource(searchresultssource);
        map.getView().fit(SearchResultsLayer.getSource().getExtent(), map.getSize());

    }
    });
}

请任何人都可以帮助我这将是非常感谢。多谢各位