病历摘要：患者男，18岁，主诉右侧进行性鼻塞半年，回吸性血涕1月余。今来院就诊，无耳鸣、听力下降、耳胀，无头痛、视矇、复视，无面色苍白、全身乏力。体检：T：36.6℃，P：82次/分，R：20次/分，BP：120/80mmHg。头颅无畸形，双颈未及肿大淋巴结，心肺听诊无异常。双侧鼻腔粘膜光滑，右侧鼻咽见一约1.0cm×1.2cm×1.5cm大小的圆形淡红色肿物，表面光滑，堵塞右侧后鼻孔。为进一步诊治，收入院。
鼻咽纤维血管瘤具有哪些临床特点？（）
A.多见于10～25岁男性青年
B.25岁以后有自愈倾向
C.病因可能与性激素分泌有关
D.病程长，生长缓慢
E.易反复鼻出血，患者常有不同程度贫血
F.肿瘤常可过裂孔侵入鼻腔、鼻窦、翼腭窝、颅内
G.肿瘤血供多来源于同侧上颌动脉和颈外动脉咽升支
H.中年患者有易复发及恶性变倾向
参考答案：A, C, D, E, F, G
| The first 50 years of the next millennium will be critical for the world’s population. By 2050 population growth should have leveled off, but by then we’ll have 10 billion people -- two-thirds as many again as we have today. The rate of population growth is something we can choose right now, though it’s not something that just happens, but a matter of human choice. The choice is a complicated one, with many variables, but it remains a choice. If we want to prevent a population explosion, we should take action now -- or assist the poorer countries to do so. They need better government, better institutions, better labor and capital markets, better schools. Anything that increases the value of women’s time and adds to the cost of caring for a child makes a woman less likely to have that child. Since big families are often seen as safety nets for illness and old age, improving poor people’s access to insurance, pensions and welfare institutions also has a major impact. This can be as simple as rural credit, providing a means of saving. Finally, there is education -- both for women and, perhaps even more important, for the next generation of children. These steps are there to be taken, but there appear to be some countries that are not seriously trying at the moment. If we cannot achieve that we will certainly not control population. That said, I don’t feel pessimistic that we are going to run out of resources: we are becoming more efficient at producing food faster than the rate at which population is increasing. There is, however, a risk that we will wreck the environment so effectively that the world will no longer be an attractive place to live. That really would be a dismal outcome, to reach world population equilibrium only to find we’d destroyed the natural environment in the process. |
The best way to help the poor people to reduce the number of children is to ______.
A．solve their practical problems they face in welfare
B．provide them with financial aid
C．educate them on the negative effect of having more children
D．make them understand that the earth faces a population explosion