两个div上下并排，各自里面table列数相同，怎么使对应的列对齐？

Question

<div>

  <table>

    <tr>

      <td></td>

      <td></td>

    </tr> 

  </table>

</div>

<div>

  <table>

    <tr>

      <td></td>

      <td></td>

    </tr> 

  </table>

</div>

Answer 1

<div>&nbsp; <table>&nbsp; &nbsp; <tr>&nbsp; &nbsp; &nbsp; <td width="200"></td>&nbsp; &nbsp; &nbsp; <td></td>&nbsp; &nbsp; </tr>&nbsp;&nbsp; </table></div><div>&nbsp; <table>&nbsp; &nbsp; <tr>&nbsp; &nbsp; &nbsp; <td width="200"></td>&nbsp; &nbsp; &nbsp; <td></td>&nbsp; &nbsp; </tr>&nbsp;&nbsp; </table></div>