如何修改 Ubuntu 20.04 下 RStudio 2023.03.0 Build 386 的中文字体

在/usr/lib/rstudio/resources/app/resources/themes/css路径下找到了 fonts.css 文件，代码如下：

/* OS-neutral styles */

pre {
   font-family: "#!font#", monospace;
}

.ace_editor, 
.ace_text-layer,
.rstudio-fixed-width-font {
   font-family: "#!font#", monospace !important;
}

/* macOS styles (fall back to Monaco/Menlo) */

.macintosh pre {
   font-family: "#!font#", "Monaco", "Menlo", monospace;
}

.macintosh .ace_editor, 
.macintosh .ace_text-layer,
.macintosh .rstudio-fixed-width-font {
   font-family: "#!font#", "Monaco", "Menlo", monospace !important;
}

/* Linux styles */

.linux pre {
   font-family: "#!font#", "Ubuntu Mono", "Droid Sans Mono", "DejaVu Sans Mono", monospace;
}

.linux .ace_editor, 
.linux .ace_text-layer,
.linux .rstudio-fixed-width-font {
   font-family: "#!font#", "Ubuntu Mono", "Droid Sans Mono", "DejaVu Sans Mono", monospace !important;
}

/* Windows styles */

.windows pre {
   font-family: "#!font#", "Consolas", "Lucida Console", monospace;
}

.windows .ace_editor, 
.windows .ace_text-layer,
.windows .rstudio-fixed-width-font {
   font-family: "#!font#", "Consolas", "Lucida Console", monospace !important;
}

不知道思源字体添加进去，请教下各位，谢谢！