發送短信 : Hierarchical document representation for summarization

  _____    _    _     _____     ______   _    _   
 /  ___|| | || | ||  /  ___||  /_   _// | \  / || 
| // __   | || | || | // __     -| ||-  |  \/  || 
| \\_\ || | \\_/ || | \\_\ ||   _| ||_  | .  . || 
 \____//   \____//   \____//   /_____// |_|\/|_|| 
  `---`     `---`     `---`    `-----`  `-`  `-`