single-mindedly       
adverb uk/ˌsɪŋ.ɡəlˈmaɪn.dɪd.li/ us/ˌsɪŋ.ɡəlˈmaɪn.dɪd.li/
 一心一意地;执着地
in a way that is very determined and thinks only about achieving a particular thing
  The company has single-mindedly pursued its goal of creating a practical mechanical heart. 公司一心一意追求打造实用机械心脏的目标。 
 The country is fortunate to have a leader who is so single-mindedly focused on making things better for the people.  这个国家很幸运,有一位一心一意地致力于改善人民生活的领导人。 
 See: single-minded
 - More examples
 - Single-mindedly pursuing a career brings nothing but misery in later life.
 - Companies that focus single-mindedly on profits don't learn, and therefore, they don't thrive.
 - Young doctors were expected to devote themselves single-mindedly to their patients.