How to make the td table and surrounded by a pitch

How to make the td table and surrounded by a pitch  

method one

Add another element in the accounting td

 

 

<tr>
<td>第2节</td>
<td>语文</td>
<td>数学</td>
<td>英语</td>
<td>英语</td>
<td class="meishu">
<a class="meishu-a">美术</a>
</td>
<td></td>
<td></td>
</tr>

.meishu-a {
width: 100px;
height: 40px;
display: block;
background: pink;
text-align: center;
line-height: 40px;
margin: auto;
border-radius: 4px;
}