循环遍历对象中的嵌套数据

Question

这是我的目标：

var testing =  {
  "total": {
    "q1": "10,000€",
    "q2": "20,000€",
    "q3": "19,000€",
    "q4": "210,000€"
  },
  "new": {
    "q1": "10,000€",
    "q2": "20,000€",
    "q3": "19,000€",
    "q4": "210,000€"
  },
  "renewal": {
    "q1": "10,000€",
    "q2": "20,000€",
    "q3": "19,000€",
    "q4": "210,000€"
  }
}

我想循环显示与“total”相关的数据，我不知道如何专门从"total"获取值。以下不起作用：（

    $.each(testing, function(i, item) {
    $("#kpi-table").find('tr.total td').each(function (i, el) {
            $(this).html(item[0].[i]);
      });
});

HTML

<table id="kpi-table" class="table table-striped">
  <thead>
    <th></th>
    <th>Q1</th>
    <th>Q2</th>
    <th>Q3</th>
    <th>Q4</th>
    <th>Month</th>
  </thead>
  <tbody>
    <tr class="total">
      <td>Total</td>
      <td class="q1"></td>
      <td class="q2"></td>
      <td class="q3"></td>
      <td class="q4"></td>
      <td></td>
    </tr>
..