quixotically       
adverb  literary uk/kwɪkˈsɒt.ɪ.kəl.i/ us/kwɪkˈsɑː.t̬ɪ.kəl.i/
 不切实际地;空想地;侠义地
in a way that is not practical or likely to succeed 
  He believes deeply, maybe quixotically, in his candidates.  他对他的候选人深信不疑,也许这是不切实际的。 
 She's quixotically determined to change him. 她想当然地决心要改变他。 
 See: quixotic
 - More examples
 - He quixotically attacks the prejudice all around him.
 - He quixotically expressed the hope that the development would be car-free.
 - She campaigned quixotically for the presidency.