jQuery找到第二个表添加TD

<div id=\"content_area\">
 <table>
    <table></table>
 </table>
 <table>
    <tr>
      <td> // I want to add another TD before this
        <table></table>
        <table></table>
      </td>  
    </tr>
 </table>
</div>


 $(\'#content_area\').find(\'table:eq(1)\').find(\'td\').before(\'<td>Data</td>\');

 $(\'#content_area\').find(\'>table:eq(1)\').find(\'td\').before(\'<td>Data</td>\');

 $(\'#content_area table:nth-child(2) tr\').prepend(\'<td>Data</td>\');