Please introduce the major countries in the United States, Canada, Australia and Europe from the aspects of difficulty in studying abroad, welfare system and national consumption level.

1, immigration. The countries with the loosest immigration policies are Canada and Australia, while the immigration policies of the United States and European countries are stricter. 2, welfare. The countries with the best social welfare are the Nordic countries Norway, Sweden and Finland. It belongs to France, Britain, Italy, Germany, Spain, Canada, Australia, New Zealand and other western European countries. 3. Consumption level. These countries belong to the most developed countries in the world, and their consumption levels are close. Accommodation in the United States is relatively cheap.