發送短信 : Urban heat and within-city residential sorting

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