Why are the American universities stricter than Chinese ones？   I don't know why the chinese universities atmosphere are so easy that everyone seldom can feel pressure,however ,in America,the courses are more tough, can someone tell me the reasons? 

Term begins==！ The day after tomorrow ,I have to return school for the new semester,actislly it is blue for me ,the trifiles about my family ,the tough relationship in school ,the part-time job ,all of which gives me so much pressure that I can't stand it at all. However,it is a new start after all ,I have to face it and solve the problems.I do'nt know what I need,maybe some power from others,maybe I just need to change my way ,I do'nt know . I have been lost for long ,but I can not allow myself to fall deeply ,I want some beneficial advice that give me a promising exit sincerely. Good luck for myself! ==(ORZ)