这应该有效(未经测试，因为我现在不在Windows计算机上):

This should work (untested, as I'm not on a Windows machine now):

file_to_open = "c:\path\to\file.txt"
system %{cmd /c "start #{file_to_open}"}

作为参考，这也可以在OS X上完成:

For reference, this can also be done on OS X:

file_to_open = "/path/to/file.txt"
system %{open "#{file_to_open}"}