问题 问答题

治疗甲状腺功能亢进症药物有哪几类举例说明。

答案

参考答案:①硫脲类:如丙硫氧嘧啶,通过抑制过氧化酶活性,使甲状腺素合成减少,同时抑制外周血T4转为T3。作用较强,较快,可用于甲亢内科治疗、甲亢术前准备和甲亢危象辅助用药等。②碘和碘化物:如碘化钾或卢戈液,大剂量碘可抑制甲状腺激素蛋白水解酶,使甲状腺激素释放减少并抑制TSH分泌。用于甲亢危象和甲亢术前准备。③β受体阻断药:如普萘洛尔,主要通过阻断β受体而改善甲亢症状,尤其是甲亢所致的心率加快等交感神经活动增强的表现;并可减少甲状腺素分泌和T3生成。用于甲亢治疗、甲危辅助治疗及术前准备,单用作用有限,与硫服类合用作用更显著。④放射性碘:如131I,利用产生β射线破坏甲状腺组织来治疗甲亢。此外γ射线可用于甲状腺功能测定。

单项选择题
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What is distance learning It means that you study on your own, at home or wherever suits you. Recently, the world famous Open University in the United Kingdom has designed a new style of distance learning, which is called (1) . The phrase "Open Learning" means you study (2) . You read course material, work on course activities, and write (3) . The word "Supported" means you have help (4) , the student services staff at regional centres, and centralized areas such as (5) . You can also contact other students through tutorials and (6) , the University’s online conferencing system, and events and clubs organized by (7) . Most distance learning courses use printed paper materials. They also include some (8) materials such as a CD, DVD or video. Many courses have a web site and an (9) . You’ll need access to a computer (10) to make use of these. The Open University can help its students buy a computer and (11) the cost of accessing the Internet.

With most distance learning courses, no (12) are required to study. of course, you have to be aged 18 when your course starts but there is no (13) . Currently the Open University has around (14) undergraduate and more than 30,000 postgraduate students, of which 10,000 have (15) . Nearly all students are studying (16) . About 70 per cent of undergraduate students are in (17) . More than 50,000 students (18) by their employers for their studies. Most distance learning courses (19) . Some of them are even available in other parts of the world. With over 25,000 of its students living outside the UK, the Open University is the (20) that offers distance learning throughout the world.

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