Andorra, which is approximately 2 1/2 times the size of Washington D.C. and boasts (according to the CIA World Book of Facts estimate for 2008) the highest longevity amongst its citizenry at 82.37 (80.35 for men; 85.14 for women). A country known for an impoverished history, however, since World War II has flourished from tourism.
about 100 kilometers
The USA, is the country at 40 degrees North latitude, and 100 degrees West longitude. The state of Nebraska contains precise location.
China
Not possible.
Canada
I think it is in China, but I am not sure.
There is no such latitude as "150 degrees north". The greatest possible north latitude is 90 degrees . . . at the north pole.
Mexico.
Canada
Thailand.
Mexico City
Mexico.