Each day we see or hear a lot news on the websites, smartphone, radio station, TV, newspapers ect. I selected/made-up a few for you to analyze: Vancouver banned public smoking. Cigarette smokers can only smoke on the destinated area. The stock price (股价) of tobacco companies has fallen 9% since the release of this regulation. ABC release a new drug for treating Alzheimer disease (老年痴呆), according to research it is more effective than 99% of similar drugs. However, buyers complain the price of new drug is unaffortable. Thousands of animal husbandry (畜牧业) farmers suffered loss due to swine fever (猪瘟). Most of them said they were unaware of the swine fever spreading across the country. Please choose one of these three news and give an analysis on how and why did these events happened based on your knowledge and class materials. Please be specific and detail, rating will be based on your logic and completeness of information.