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What is the lecture mainly about
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男性，56岁，肝硬化腹水患者。1周来发热，腹痛，体温38℃，脉搏100次/分，呼吸26次/分，踝部可凹性水肿。腹水检查：微黄色，微浑，比重1.016，细胞数0.8×109/L，白细胞数0.5×109/L，中性0.70，淋巴0.30。应首先考虑的诊断是
售汇即出口单位将出口货物销售所获取的外币按当日银行外汇牌价卖给银行。( )
In common with many countries, Britain has serious environmental problems. In 1952, more than 4,000 people died in London because of the smog. The government (26) new laws to stop smog from coal fires and factories and the (27) improved a lot. Today, London is much cleaner (28) there is a new problem: smog from cars. In December 1991, there was very (29) wind in London and pollution (30) a lot, which led to 160 deaths in just four days. (31) of the problem is the new "out of town" shopping centers. In the past, people often (32) to shops near their home or went by bus. Today, many people drive to the new shopping centers. (33) , the small shops have (34) and more people have to go a long way to (35) their shopping. Critics say that Britain needs better and cheaper public (36) . Many people are trying to (37) the use of cars in Britain. Some cities now have special bicycle (38) and many people ride to work. Some people also (39) to work together in one car to reduce the pollution and the (40) . Sometimes people take "direct (41) ." In 1995, for example, many people wanted to (42) a new road near Newbury. They built houses (43) trees and lived there for many months. It (44) a long time to force the people out of the trees (45) work on the road could continue.
To get a chocolate out of a box requires a considerable amount of unpacking: the box has to be taken out of the paper bag in which it arrived, the cellophane wrapper has to be torn off, the lid opened and the paper removed, the chocolate itself then has to be unwrapped from its own piece of paper. But this overuse of wrapping is not confined to luxuries. It is now becoming increasingly difficult to buy anything that is not done up in beautiful wrapping. The package itself is of no interest to the shopper, who usually throws it away immediately. Useless wrapping accounts for much of the refuse put out by the average London household each week. So why is it done Some of it, like the cellophane on meat, is necessary, but most of the rest is simply competitive selling. This is absurd. Packaging is using up scarce energy and resources and messing up the environment. Recycling is already happening with milk bottles which are returned to the dairies, washed out, and refilled. But both glass and paper are being threatened by the growing use of plastic. More dairies are experimenting with plastic bottles. The trouble with plastic is that it does not rot. Some environmentalists argue that the only solution to the problem of ever increasing plastic containers is to do away with plastic altogether in the shops, a suggestion unacceptable to many manufactures who say there is no alternative to their handy plastic packs. It is evident that more research is needed into the recovery and re-use of various materials and into the cost of collecting and recycling containers as opposed to producing new ones. Unnecessary packaging, intended to be used just once, and make things look better so more people will buy them, is clearly becoming increasingly absurd. But it is not so much a question of doing away with packaging as using it sensibly. What is needed now is a more advanced approach to using scarce resources for what is, after all, a relatively unimportant function. "This overuse of wrapping is not confined to luxuries" (line 4, paragraph 1) means ______.
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