MARKDOWN 引用语法
要创建块引用，请在段落前添加一个 > 符号。
渲染效果如下所示：
> Dorothy followed her through many of the beautiful rooms in her castle.
多个段落的块引用
块引用可以包含多个段落。为段落之间的空白行添加一个 > 符号。
渲染效果如下：
> Dorothy followed her through many of the beautiful rooms in her castle.
>
> The Witch bade her clean the pots and kettles and sweep the floor and keep the fire fed with wood.
嵌套块引用
块引用可以嵌套。在要嵌套的段落前添加一个 >> 符号。
渲染效果如下：
> Dorothy followed her through many of the beautiful rooms in her castle.
>
> > The Witch bade her clean the pots and kettles and sweep the floor and keep the fire fed with wood.
带有其它元素的块引用
块引用可以包含其他 Markdown 格式的元素。并非所有元素都可以使用，你需要进行实验以查看哪些元素有效。
渲染效果如下：
> THE QUARTERLY RESULTS LOOK GREAT!
>
> * Revenue was off the chart.
> * Profits were higher than ever.
>
> Everything is going according to plan.
