title: How to design a distributed system for "finding something within X miles"?
body: <p>Question:</p>
  
  <blockquote>
    <p>Design a distributed system to response the clients' query about "finding something within X miles".</p>
  </blockquote>
  
  <p>If X is infinite, get all the "something" in the world (if they are all stored in your database)</p>