posthaste ['poʊst'heɪst]

例句:

• Medical aid must be sent to the stricken area posthaste.
  灾区需用医药,急如星火.
  
• Please come and help me posthaste, I really need you.
  请尽快来帮我, 我非常需要你.
  
• Please send your answer to me posthaste.
  请尽快回信答复我.
  
• When I'd sheepishly say no, she'd point out that I could talk to her at home, and shoo me off the line posthaste.
  来自WSJ