C Sports is not only physically challenging, but it can also mentally challenging. Criticism（批评）from coaches(trainers), parents, and other teammates, as well a s pressure to win can create too much anxiety or stress for young athletes. Stress can be physical, emotional, or psychological, and research has showed that it can lead to burnout. Burnout has been described as dropping or quitting of an activity that was at one time enjoyable. The early years of development are critical years for learning about oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to cooperate with others, make friends, and gain other social skills that will be used throughout their live s. Coaches and parents should be aware(realize), at all times, that their feedback（反馈）to youngsters can greatly affect their children. Youngsters many take their parents’ and coaches’ criticisms to heart and find a flaw（缺陷） in themselves. Coaches and parents should also be cautious(careful) that youth sport participation does not become work for children. The outcome of the game should not be more important than the process of learning the sport and other life lessons. In today’s youth sport setting, young athletes may be worrying more about who will win instead of enjoying themselves and the sport. Following a game, many parents and coaches focus on(pay more attention to) the outcome and find fault with youngsters’ performances. Positive reinforcement should be provided in spite of the outcome. Research shows that positive reinforcement motivates and has a greater effect on learning than criticism. Again, criticism can create high levels of stress(pressure), which can lead to burnout. 64．According to the passage sport is positive for young people in that         . A．it can help them learn more about society B．it teaches them how to set realistic goals for themselves C．it enables them to find flaws in themselves D．it can provide them with valuable experiences 65．Many coaches and parents are in the habit of criticizing young athletes         . A．without realizing criticism may destroy their self-confidence B．in order to make them remember life’s lessons C．believing that criticism is beneficial for their early development D．so as to put more pressure on them 66．According to the passage parents and coaches should         . A．help children to win every game B．pay more attention to letting children enjoy sports C．enable children to understand the positive aspect of sports D．train children to deal with stress 67．The author’s purpose in writing the passage is         . A．to persuade young children not to worry about criticism B．to emphasize the importance of positive reinforcement to children C．to discuss the skill of combing c riticism with encouragement D．to teach young athletes how to avoid burnout