指令（Directives）

Directives是Roles之外的另一个rst使用的显式标记，用以拓展它的功能。Directive block包含三个部分：参数（arguments），选项（options，一个rst语法表示的列表)，内容（content）。

它的结构通常是这样的：:

+-------+-------------------------------+
| ".. " | directive type "::" directive |
+-------+ block                         |
        |                               |
        +-------------------------------+

比如插入一个图片：:

.. image:: http://www.w3school.com.cn//i/eg_tulip.jpg

插入一个危险提示：:

.. DANGER::
    Beware killer rabbits!

Danger

Beware killer rabbits!

插入一个csv表格：:

.. csv-table:: Frozen Delights!
   :header: "Treat", "Quantity", "Description"
   :widths: 15, 10, 30

   "Albatross", 2.99, "On a stick!"
   "Crunchy Frog", 1.49, "If we took the bones out, it wouldn't be crunchy, now would it?"

Frozen Delights!

Treat	Quantity	Description
Albatross	2.99	On a stick!
Crunchy Frog	1.49	If we took the bones out, it wouldn’t be crunchy, now would it?