HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];来获取客户端的ip地址，在调用异步方法（wait Task.Run(() =>{ })）前需要将主线程中获取的HttpContext.Current对象存至缓存（Cache）中达到多线程共享的目的。如果不是通过主线程获取HttpContext.Current对象将会报空指针异常（NullPointerException）。
See which states and cities have told residents to stay at home. The New York Times. 2020. https://www.nytimes.com/interactive/2020/us/coronavirus-stay-at-home-order.html. Tang K, Gaoshan J, Ahonsi B. Sexual and reproductive health (SRH): a key issue in the emergency response to ...
Some of the site visitors used the chatbot features (17, 449 visitors) and clicked on online self-test providers (8700 clicks) [71]. Aside from research purposes, chatbots are used by an international HIV/AIDS organization to provide information about HIV to youth. Users have responded ...
There was no significant difference in the number of clicks between HIV-related short links, and other areas of health (t = −0.195, p = 0.85). The most highly accessed link within the whole message set related to HIV home testing (message 11) which generated 59 impressions (24.1% of ...