显示相应列表项时如何显示代码块？

Question

在以下 RMarkdown MWE 中：

---
title: "Untitled"
output: 
 beamer_presentation:
   slide_level: 2
---

# Paragraph

## Slide

Hello

>- This is the first item
>- This is the second item

  ```{r}
  a <- 2+2
  ```

我希望在生成的 PDF 文件中显示第二个列表项时显示代码块，而不是在显示第一个项目时显示代码块。

Answer 1

在> 块中包含代码。这行得通，

---
title: "Untitled"
output: 
 beamer_presentation:
   slide_level: 2
---

# Paragraph

## Slide

Hello

>- This is the first item

>- This is the second item
> 
>   ```{r}
>   a <- 2+2
>   ```