According to the passage, those who are the least exposed to media violence are citizens of _______.

(67)

(65)

(64)

(66)

According to the author, what is the relationship between media violence and real-life violence?

[(63) In your quest for success, enthusiasm means that you believe deeply in what the company is doing. ]You also believe that your job is important and contributes to the cause. It means that you’re willing to work your butt off (努力做事) to achieve the company’s goals. [(64) Real enthusiasm is when you leap out of bed in the morning and attack your day full of energy. ][(65) You have zeal for the work you do and the people you work with. This pushes you to improve and become a better person. ]Enthusiasm means that you are stimulated by your work，and are able to find new challenges and keep growing professionally.[ (66)Furthermore, most jobs have some elements that are less fun and more difficult to carry out. ]This is where passion really comes into play. [(67) When you love what you do, it isn’t too difficult to get mentally prepared and get the job done. ]The hard part is performing equally well in those less interesting tasks. 

 (From Enthusiasm Leads to Success) 

 (63)

Why does the author examine the historical roots of violence in the first paragraph?

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(59)

(60)