perfunctorily

pintapuolisesti In a perfunctory manner, without interest or concern for quality.
(RQ:Chmbrs YngrSt)

And it was while all were passionately intent upon the pleasing and snake-like progress of their uncle that a young girl in furs, ascending the stairs two at a time, peeped perfunctorily into the nursery as she passed the hallway—and halted amazed.