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

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發送短信 : To thank or not to thank: Understanding the differences between gratitude and indebtedness after receiving a favor through emotion appraisals, motivations and behaviors