morsel          
noun [ C ] uk/ˈmɔː.səl/ us/ˈmɔːr.səl/
 (食物的)一口,一小份
a very small piece of food
  a morsel of cheese 一小块奶酪 
 The prisoners ate every last morsel. 囚犯们把最后每一丁点儿食物都吃了个干净。 
  一点点,点滴
a very small piece or amount
  a morsel of good news 一点点好消息