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我正在尝试学习谷歌图表。我想在标题前面显示总数。我怎样才能做到这一点。

      google.charts.load("current", {packages:["corechart"]});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable([
          ['Task', 'Hours per Day'],
          ['Work',     11],
          ['Eat',      2],
          ['Commute',  2],
          ['Watch TV', 2],
          ['Sleep',    7]
        ]);

        var options = {
          title: 'My Daily Activities',
          is3D: true,
        };

        var chart = new google.visualization.PieChart(document.getElementById('piechart_3d'));
        chart.draw(data, options);
      }
<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>

  </head>
  <body>
    <div id="piechart_3d" style="width: 900px; height: 500px;"></div>
  </body>
</html>

我想要这样

提前致谢。

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