They were almost 'within striking distance' of their goal. = Their goal was almost 'within striking distance'. [=they were close to achieving their goal]
He spotted the group 'at a distance of' one mile. [=he saw the group when they were one mile away from him]
('Brit') The book is better than the movie 'by some distance'. [=the book is much better than the movie]
(..) This is last week's. Oh, of course. Sorry. Long journey. Brought it down from yards. One shot. Oh, that's... that's a fair distance. So do you do much hunting up at the Wall? Oh, yes. Yes. A good amount. North of the Wall, (..)2016 TvShow: Game of Thrones Title: Blood of My Blood Season: 6 Episode 6