病历摘要：患者男性75岁，30余年前始出现反复咳嗽、咳痰，冬春季节多发，每年发作3～5次，每次持续2～3周经治疗后好转。10年前出现活动后气促，进行性加重。2年前始出现双下肢浮肿，多在午后出现，次晨消失。1周前上述症状加重，咳脓性痰，不能平卧，并双下肢浮肿，感头昏，精神、食纳差。既往有吸烟史30年。体查：T38℃，P124bpm，R25bpm，BP135/80mmHg，颈静脉怒张，桶状胸，双肺叩诊呈过清音，双肺呼吸音减弱，呼气相延长，双肺可闻及散在性干湿啰音。肝肋下2cm，有压痛。心界向左扩大，心率124bpm，P2>A2。双下肢胫前以下呈凹陷性水肿。肺功能示：FEV1/FVC45%，FEV1%30%预计值。
急诊医师应首先完善哪些主要辅助检查？（）
A.血常规
B.PEF及其变异率测定
C.胸部CT
D.胸片
E.ECG
F.动脉血气分析
参考答案：A, D, E, F
Napoga Gurigo，a 12-year-old girl，lives in a village in Ghana. It is 1 for her family to get clean drinking water. The nearest place to get water is a muddy （混浊的） water hole half a kilometer away from her 2 . Animals and villagers use it alike. Each morning, Napoga leaves home at half past five to collect water for her family. Sometimes it 3 a few hours to get enough water. Napoga has no time to go to school for learning. In the neighboring areas, many boys and girls 4 Napoga. They can't keep strong and 5 just because they have not enough drinking water. In fact, 70% of Earth's surface is water. But most of 6 is sea water. We can't use salty water in our daily life. Fresh water is what we __7__ drink, take showers and cook food. And fresh water covers only 1 percent of Earth's surface. In some areas people try to make deep wells （水井） to get water from 8 . But there still 9 enough for farming. Scientists say that 10 30 years, more people in the world will face all kinds of water problems than now. So we must do something to take care of our water resources (资源).
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