發送短信 : Obfuscation and Rational Inattention

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