不需要the：国家/地名(该名不指a group of islands or states)
需要the：the + 国家/地名(该名指a group of islands or states)
The increment was slightly larger in America/England/Japan.
The increment was slightly larger in the United States/the UK/the United Arab Emirates.
Human beings are especially superstitious about numbers.
The number eight is considered lucky in some countries.
需要the：the + 名词 + of something 特指
不需要the：名词 + of something 泛指
不需要the：every/each + 名词 + of something
If the relentless advance of international brands into every corner of the world continues, these bland packages might one day completely oust the traditional objects of a nation.
Survival of the fittest is nature’s way of ruthlessly allowing weaker specimens to die out.
The evidence of climate change is there for us all to see: rising sea levels and associated flooding with the loss of homes at low land levels are becoming more frequent. …Habitable areas are gradually shrinking, often for some of the poorest groups of people, but there seems to be little obvious action taking place. If the major contributors to climate change will not support the reduction of greenhouse gases, there is little hope for the future.