男孩，3岁。发热伴呕吐半天。体检：体温39℃，神萎，面色较苍白，皮肤可见瘀点，无明显神经系统体征。拟诊为流行性脑脊髓膜炎。考虑该患儿处于临床哪一期（）
A.前驱期
B.上呼吸道炎期
C.潜伏期
D.败血症期
E.脑膜炎期
参考答案：D
解析：流行性脑脊髓膜炎的发病过程分为三个阶段，上呼吸道感染期、败血症期和脑膜炎期。该患儿病程较短，临床表现为高热、皮肤瘀点，尚无脑膜刺激征等神经系统表现，因此临床可考虑患儿暂时处于败血症期，如果不及时治疗将很快进展并可累及中枢神经系统。
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When speaking about renewable energy, we are talking about power which derives its energy from resources which will not be diminished from the use.Renewable energy is a substitute for the non－renewable energy of fossil f  uel.2._____ One fundamental advantage of renewable energy, and environmentalists' favorite reason to promote its use, is that there are no greenhouse gases or other pollutants give out as there are with the burning of fossil fuel  s.Renewable energy, or solar, water and wind power, are certainly not new although they havereceived much attention recently because they will not cause pollution.Environmental friendly power sources such as wind, solar an  d water power have been used in both developing and developed countries for a long time because they are cheap and clean, but they have yet to be used as a primary source of energy for any big urban area. 3._____ The generation of power from renewable energy sources has become somewhat more common in recent times as people have increasingly become aware of issues such as climate change due to fossil fuel by－products and the political or social worri  es about nuclear power.There are numerous countries and non－profit, environmentally conscious organizations that are supporting the use of renewable energy. 4._____ The flow of renewable energy has to do with naturally occurring phenomena.Tides, sunlight, wind and heat are all created by geothermal events and all are sources of energy has unique characteristics related to where and how we can use them. 5._____ Most technology which transforms renewable energy into power  which we can use is solar power either directly or indirectly.The atmospheric system of the earth keeps balance so that the heat which spreads out into space is equal to the amount of radiation received from the sun.The quantity of energy contained in the atmosphere approximates the earth' s climate.The bodies of water of the earth, or its hydrosphere, absorb much of the radiation which is received from the sun.And much of that absorbed radiation is in the lower latitudes surrounding the equator. |