(二)    People who are cheerful and relaxed are less likely to suffer from colds. It’s __13__ that being full of vim(活力) and vigor (精力)helps the body fight illnesses, say the researchers from Carnegie Mellon University (CMU) in Pittsburgh.    “We need to take more seriously the possibility that a __14__ emotional style is a major player in disease risk，” says psychologist Sheldon Cohen, the study’s lead researcher.    In a previous study, Cohen and his colleagues found that people who__15__ to be cheerful and lively were least likely to develop sniffles, coughs, and other cold symptoms(症状).    Those findings were interesting, but they didn’t prove that a person’s __16__ affects whether he or she gets sick. Instead, it was still possible that a person’s underlying personality is what matters.    __17__ suggests, for instance, that certain people are naturally more likely to be outgoing and  optimistic, with high self-respect and a sense of __18__ over life. This would mean that who we are, not how we feel, finally decides our __19__ of catching colds.    To figure out which mattered more (personality or emotions), the CMU team  __20__193 healthy adults. The rese archers talked to each person over the phone every evening for 2 weeks. They told the researchers about the positive and negative __21__ they had experienced that day.    The results showed that everyone in the study was__22__ likely to get infected . Their symptoms, however, __23__ depending on the types of emotions that they had reported over the previous 2 weeks.    Scientists__24__ a bout whether negative emotions or positive emotions have a stronger effect on how  healthy we are. Fo r now, it can’t hurt to look on the bright side more often than not!    本文是说明文。全文讲述了通过研究，发现乐观轻松的人患感冒的机会很少。