[plt-scheme] using mzscheme like DrScheme

I'm sorry if this is an utterly basic question, but: as I understand 
mzscheme -r myfile.ss, it will evaluate expressions in myfile.ss but 
won't print the results in the way DrScheme does (when a program in the 
Definitions window is run). It will, however, print anything which is 
the result of explicit output (display, printf, etc.). Is there any way 
to get it to behave like DrScheme, or are there reasons why I should 
never contemplate asking it to do such a thing? Many thanks. --PR