There is now such an immense microliterature on hepatics that, beyond a certain point I have given up trying to integrate (and evaluate) every minor paper published—especially narrowly floristic papers.
With a little margin or space; by a small distance; hence, closely; hardly; barely; only just; often with reference to an avoided danger or misfortune; as, he narrowly escaped
With minute scrutiny; closely; as, to look or watch narrowly; to search narrowly
in a narrow manner; not allowing for exceptions; "he interprets the law narrowly
If you look at someone narrowly, you look at them in a concentrated way, often because you think they are not giving you full information about something. He grimaced and looked narrowly at his colleague. see also narrow = closely