[解析]
(1)B.推理判断题。根据第一段内容A study led by Plana﹣Ripoll,a doctor at Aarhus University in Denmark,tries to deal with a fundamental question that has bothered researchers for more than a century—what exactly causes mental illness? (丹麦奥胡斯大学的Plana﹣Ripoll博士领导了一项研究,试图解决一个困扰了研究人员一个多世纪的基本问题﹣﹣﹣究竟是什么导致了精神疾病?)可知,精神疾病的根源是什么,这一问题困扰了研究人员一个多世纪。故选B项。
(2)A.细节理解题。根据第三段最后一句"Instead,recently they've found that disorders shade into each other,and there are no hard dividing lines.(相反,他们最近发现,紊乱相互影响,并且没有明显的分界线。)"可知,研究人员最近发现各种精神障碍之间存在联系。故选A项。
(3)C.细节理解题。根据第四段的Perhaps there are several dimensions of mental illness,so depending on how a person scores on each dimension,they might be more likely to have some disorders than others.(精神疾病可能有多个维度,因此根据一个人在每个维度上的得分,他们可能比其他人更容易患上某些疾病。)和最后一句Both ideas are being taken seriously though the former one is more widely accepted by the researchers.(这两种观点都得到了认真的对待,但前者更被研究人员广泛接受。)可知,多维度的概念更广泛地被研究人员接受。故选C项。
(4)A.推理判断题。根据最后一段中They are also hopeful that,in the long run,replacing this framework with one that is grounded in biology will lead to new drugs and treatments.The researchers aim to reveal,for instance,the key genes,brain regions and neurological processes involved in psychopathology (精神病理学),and target them with treatments. (他们也希望,从长远来看,用一个基于生物学的框架取代这个框架,将会带来新的药物和治疗方法。例如,研究人员旨在揭示与精神病理学有关的关键基因、大脑区域和神经过程,并针对它们进行治疗。)可推知,研究精神疾病的病理以及引发精神疾病的生物学因素可能会对他们接下来的工作有所帮助。故选A项。