發送短信 : Day of the Week Effects on the SES

   _____   _    _     _____    _    _     _____   
  / ___// | || | ||  / ____|| | || | ||  / ____|| 
  \___ \\ | || | || / //---`' | || | || / //---`' 
  /    // | \\_/ || \ \\___   | \\_/ || \ \\___   
 /____//   \____//   \_____||  \____//   \_____|| 
`-----`     `---`     `----`    `---`     `----`