Recent studies suggest that people who suffer multiple brain injuries are at significant risk for de

【分析】
这是一篇议论文。最近的研究表明，遭受多种脑损伤的人有发展成慢性创伤性脑病(CTE)的重大风险，这是一种脑疾病，在最初的损伤几周、几个月甚至几年之后，会引起各种危险的精神和情感问题。虽然新的体育法规和头盔技术的改进有助于保护运动员，但业余联盟、体育媒体和球迷都对减少脑损伤负有部分责任。
4．推理判断题。根据第二段“In response to the growing understanding of this danger, the National Football League (NFL) has revised its safety regulations. In an effort to diminish the amount of head and neck injuries on the field. NFL officials began enforcing stricter penalty calls for helmet-to-helmet contact, leading with the head, and hitting a defenseless player.”可知，为了应对这种危险，国家橄榄球联盟修订了安全条例。努力减少头部和颈部的伤害。美国国家橄榄球联盟官员开始对头盔对头盔的接触，撞击头部，撞击没有任何保护的球员进行严厉的处罚。由此判断出B选项“NFL官员在解决CTE问题上做得很少”错误。故选B项。
5．细节理解题。根据第三段“However, new regulations at the professional level cannot protect amateur players, especially young people. Deadly cases of CTE have been reported in victims as young as 21. Youth, high school and college leagues should also adopt safety rules even stricter than those of the NFL.”可知，然而，职业层面的新规定并不能保护业余选手，尤其是年轻人。据报道，受害者中有致命的CTE病例，年龄最小的只有21岁。青年、高中和大学联盟也应该采用比NFL更严格的安全规则。所以D选项“青少年、高中和大学联盟采用更严格的安全规则”不是业余运动员患CTE的原因。故选D项。
6．词句猜测题。根据划线词后的句子“professionals are rewarded for injuring each other on the field and amateurs become more likely to try to imitate their favorite NFL athletes.” 可知，职业球员在球场上互相伤害会得到奖励，而业余球员则更有可能模仿他们最喜欢的NFL运动员。由此可知，当媒体大加赞扬这种危险的行为时，会出现上述情况。故划线词的意思是“赞扬”。故选A项。
7．推理判断题。根据全文尤其是第二段“Although new sports regulations and improvements in helmet technology can help protect players, amateur leagues, the sports media, and fans all bear some of the responsibility for reducing brain injuries.”可知，虽然新的体育法规和头盔技术的改进有助于保护运动员，但业余联盟、体育媒体和球迷都对减少脑损伤负有部分责任。由此判断出这篇文章的作者主要想表达他对CET问题的看法。故选D项。