女性，25岁。1周前因发热、腹痛、腹泻来门诊，大便每天20余次，为脓血便，量少，伴里急后重，按急性菌痢给抗菌药物口服5d，症状好转，昨天吃不新鲜水果后，再次腹痛，腹泻，大便每天10余次，伴里急后重。
目前对细菌性痢疾的治疗，最有效抗菌药物是（）
A.氯霉素
B.黄连素
C.诺氟沙星（氟哌酸）
D.复方磺胺甲噁唑（复方新诺明，SMzC0）
E.吡哌酸
参考答案：C
What do you usually use your cellphone for? Calling friends or sending them text messages? As technology develops，nowadays cellphones can do much more than that．They have become all-in-one cell-phones. A typical example is Apple’s phone.The touch-screen cellphone plays music，connects to the Web，sends emails and takes photos. More than 1 million Apple’s phones have been sold since it was sold in June. “Today’s young people enjoy using all kinds of digital functions，such as those of a music player，a camera and even a computer. An all-in-one cellphone is easy to carry. That is the goal of developing a technology to make our lives more convenient，simple and relaxed，said Professor Ding Shouqian at Nankai University． However, the all-in-one cellphones come with some problems. Users have complained that they are too complicated to use them, and that their battery life is too short. Cellphone producers say that they are working hard to make their phones even better. It is very convenient to use it. “We are trying to make the cellphones in a way that people can quickly move from phoning to taking pictures to listening to music, said Alastair Curtis, Nokia’s chief designer.“If you look at the Nokia 3250 model, it has a twisting(转动) bottom. So you twist it half a turn，and it’s in camera mode. You twist it another 90 degrees, and it’s in music player mode．”Japanese companies such as Toshiba and Fujitsu are also working to develop a new kind of battery for cellphones． If all the problems are solved in the future, all-in-one phones will change our lives for the better.
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