title: How could I utilize algorithms for nearest neighbor search to do fixed radius search?
body: <p>There are lots of works for the nearest neighbor search problem, so I wonder if I want to do <a href="http://www.wikiwand.com/en/Nearest_neighbor_search#/Fixed-radius_near_neighbors" rel="noreferrer">fixed radius range search</a>, could I utilize those algorithms for nearest neighbor search? </p>
  
  <p>perhaps I could do kth-nearest-neighbor search over and over again until I find a point beyond the radius range, but I suppose it might cause a lot of waste.</p>