年轻人们不得不面对沉重的房租，有的甚至从家里出来身无分文，不得不面对可能要露宿街头的窘境，生活真的不容易。

●头孢噻吩钠

这里离梦想更近

Yu Yuan Garden boasts many lattice windows, which are found in the corridors and on the walls. They were covered by paper of foil of shells 400 years ago instead of glas as they are now. Built with a mixture of clay, lime and alum, each of them presents a different design. On the windows near the Three Corn-Ear Hall are designs of pine, crane and lingzhi herb, which symbolize fortune, wealth, longevity and happiness.

那么，头孢类药物到底需不需要做皮肤试验（简称：皮试）呢？