Link

I end up solving my problem accidentally.

And it is easy. I create a conventional short-cut for the file that I want easy access, and then copy that short-cut to the Evernote page - in which it appears as an ordinary file with "lnk" as the extension. When it is double-clicked, the original file in the hard disk is opened by the usual program. (I try it on all Microsoft Office applications as well as SPSS files.)

The point is, if the original file is in Google Drive, it would then be synchronized automatically after saving. You can access the same file from different Evernote pages because you just put hyperlinks rather than the original file in the page. Moreover, if you are the rare species who works on two computers with the same Google Drive, the link would still work in both computers - as long as the filing structure (i.e. the path name) of the target file remains the same.

And it works equally well if the link is made to a foler rather than a single file.