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

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發送短信 : Service quality : a case study on Jack's Place