资料来源 : pyDict

锋利地,激烈地;敏锐地;热心地

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Keenly \Keen"ly\, adv.
   In a keen manner.

资料来源 : WordNet®

keenly
     adv : in a keen and discriminating manner; "he was keenly aware of
           his own shortcomings"