pandoc和rmarkdown:不能在rmarkdown文档的一层上获取图像

I am just starting to use rmarkdown, pandoc and knitr. I am having a great deal of difficult trying to get pandoc to fetch an image that is one level above an rmarkdown document. For example, consider our project directory is ~/test, the following rmarkdown is located at ~/test/scripts:I am just starting to use rmarkdown, pandoc and