如何允许在Highcharts圆环图中选择多个点？

plotOptions: {
  pie: {
    allowPointSelect: true
  }
}

plotOptions: {
  pie: {
    allowPointSelect: true,
    events: {
      select: function(event) {
        // 处理选择事件
      }
    }
  }
}

plotOptions: {
  pie: {
    allowPointSelect: true,
    events: {
      select: function(event) {
        var selectedPoints = event.points;
        // 处理选择的数据点
      }
    }
  }
}

plotOptions: {
  pie: {
    allowPointSelect: true,
    events: {
      select: function(event) {
        var selectedPoints = event.points;
        selectedPoints.forEach(function(point) {
          console.log("Selected point: " + point.name);
        });
      }
    }
  }
}