sweetie  
noun (also sweety) uk/ˈswiː.ti/ us/ˈswiː.t̬i/
  (FOOD)     
  [ C ] UK child's word糖果,甜食 
a sweet
   (PERSON)         
 [ C ] informal和蔼可亲的人,讨人喜欢的人 
a very pleasant or kind person
  He's a real sweetie. 他真是讨人喜欢。 
  [ S ] informal(爱称或昵称)亲爱的 
used for talking to someone you love, such as a child, partner, or good friend
  [ as form of address ] It's time for bed, sweetie. 该睡觉了,亲爱的。