conscientiousness
noun /ˌkɒnʃiˈenʃəsnəs/
  /ˌkɑːnʃiˈenʃəsnəs/
[uncountable]- the quality of doing things carefully and correctly 勤勉认真的;一丝不苟的 - They were impressed by the professionalism and conscientiousness of the staff.员工的专业精神和责任心给他们留下了深刻的印象。 
 
- They were impressed by the professionalism and conscientiousness of the staff.