如何将多个样式表附加到 rmarkdown 文档?

How do I attach more than one stylesheet to an rmarkdown document?

如果我正在创建 .rmd 报告并且这是我的 YAML 示例,我如何将另一个样式表附加到该报告的输出?

---
title: "Example Report"
author: "Cool guy 62"
date: "`r format(Sys.time(), '%d %B, %Y')`"
output:
  html_document:
    theme: null
    css: 'style.css'
---

将多个 css 文件放入括号中的数组,如下所示:

---
title: "Example Report"
author: "Cool guy 62"
date: "`r format(Sys.time(), '%d %B, %Y')`"
output:
  html_document:
    theme: null
    css: ['browserreset.css', 'style.css', 'C:/Users/coolguy62/webpages/styles/bootstrap-modified.css']
---