The passage suggests that ______.

参考解析：

细节理解题。从文章第二段第四句“But recent studies have shown that cold temperatures cause stress on the body, and that stress can create conditions more inviting to viruses.”可知，身体有压力的时候很容易生病，B项正确。根据最后一段最后一句“But aspirin should not be given to children because it can cause serious problems.”可知，文中只说明孩子不能食用阿司匹林，未说明对成年人的影响，所以A项错误；根据第二段第二句“Nelson says research may be just starting to provide proofs for long-held beliefs.”可知，一些关于预防感冒的老建议是有意义的，所以C项错误；根据第二段第四句“But recent studies have shown that cold temperatures cause stress on the body, and that stress can create conditions more inviting to viruses.”可知，感冒会引起流感的观点最近才被证明是正确的，D项错误。故选B。