提问最近去听一个谈腰酸背痛的医疗保健讲座。预先买了票，当天去到现场，见人山人海，许多人没事先购票，临时才付费进场，主办者只好急急张罗椅子加插座位。场面闹哄哄，反应异常热烈，出席者得排队轮流发问。问题几乎都是关于个人的病痛，但个人的问题其实也是座中大多... Asked recently to listen to a lecture on health care about back pain. Tickets were bought in advance and they arrived at the scene on the day of the event. Many people did not purchase the tickets beforehand and paid for entry. The organizers had no choice but to rush to add chairs and sockets. The scene was noisy and the response was very enthusiastic. The attendees had to queue up and ask questions in turn. The problems are almost all about personal illnesses, but personal problems are also mostly in the seats...