在现代生活的喧嚣中，过敏症如影随形，提醒我珍惜健康。轻点好疼

　　Changes to the bacteria that live inside all of us are responsible for increasing the number of people with allergies, suggests new research. 　　In this episode of Horizon, the show investigates this claim by conducting a unique experiment with two allergic families in order to find out just what it is in the modern world that is to blame. With a raft of mini cameras, GPS units an... (展开全部)