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将以下数字修约为四位有效数字：3.8705（）.
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Just 10 years into a new century, more than two-thirds of the country sees the past decade as a period of decline for the U. S. , according to a new TIME poll that probed Americans on the decade since the tragic events of Sept. 11, 2001. The poll confirms that the country is going through one of its longest sustained periods of unhappiness and pessimism ever. Today’s teenagers hardly remember a time before 9/11, the war on terrorism, the war in Iraq and constant economic upheaval. Baby boomers, the generation known for continuous reinvention, are filled with worry and doubt about their future and the future of their children. It is hard to overstate what a fundamental change this represents. A country long celebrated for its optimism amid adversity is having trouble finding the pluck and the spirit that have seen it through everything from world wars to nuclear threats to space races. The U.S. usually bounces back after a few years of difficulty, such as the Vietnam War, Watergate or recessions. After two or three years of anxiety and worry, the electorate normally returns to its innate optimism. Yet the forces now aligned against the American people seem much more formidable to those we surveyed. According to the poll, only 6% of more than 2, 000 Americans believe the country has completely recovered from the events of 9/11. Some of this pessimism can be tied to fears of more terrorist attacks. Despite the death of Bin Laden, most Americans think another terrorist attack in the U. S. is likely. Americans generally supported the post-9/ll measures to secure the homeland, like those in the Patriot Act, and have confidence in the military to deal with terrorists—and yet they see an attack coming anyway. America’s feelings of invincibility have been replaced by a new sense of inevitable vulnerability. Post-9/11 American also take a "leave-me-alone" attitude toward the rest of world. Most respondents have no desire to be more involved in global affairs. Almost two-thirds (62%) believe the U. S. today is too involved overseas. But whatever the U. S. ’s worries about external forces, the biggest threats today are widely regarded as self-made. It’s the enemy within that Americans register the most concern about: runaway deficits, political conflicts, skyrocketing health care costs and other structural problems. If there is widespread agreement that the U. S. is in bad shape, there is also a perception that not everyone has experienced the difficult decade in exactly the same way. Those surveyed say middle-and working-class Americans, followed by seniors and younger people, have borne the brunt of the decline. Yet those surveyed said some demographic groups were better off than they were a decade ago; they say the quality of life has improved most for gays and lesbians, the affluent, Hispanics and immigrants. And while overall the U.S. is seen as becoming more socially and politically tolerant in the past decade, the majority agreed that 9/11 set off a wave of suspicion against Muslim Americans. President Jimmy Carter rather famously gave a speech in mid-1979 suggesting that a crisis of confidence had befallen America. It took several years and a new President to return the country to its optimistic ways. President Bill Clinton faced a similar moment in 1995 and turned the mood of the country around a year later. This poll suggests we are at another malaise moment, one even longer and deeper than the mid-1970s’, presenting even greater challenges—and opportunities—for leadership. The main idea implied by the author in the last paragraph is that ______.
下列各指示液分别与哪些滴定方法相对应 亚硝酸钠法
Years ago, Charlie, a highly respected orthopedist and a mentor of mine, found a lump in his stomach. He had a surgeon explore the area, and the diagnosis was pancreatic cancer. He went home the next day, closed his practice, and never set foot in a hospital again. He focused on spending time with family and feeling as good as possible. Several months later, he died at home. He got no chemotherapy, radiation, or surgical treatment. Medicare didn’t spend much on him.It’s not a frequent topic of discussion, but doctors die, too. And they don’t die like the rest of us. What’s unusual about them is not how much treatment they get compared to most Americans, but how little. Of course, doctors don’t want to die ; they want to live. But they know enough about modern medicine to know its limits. Almost all medical professionals have seen what we call "futile care" being performed on people. That’s when doctors bring the cutting edge of technology to bear on a grievously ill person near the end of life. The patient will get cut open, perforated with tubes, hooked up to machines, and assaulted with drugs. I cannot count the number of times fellow physicians have told me, in words that vary only slightly, "Promise me if you find me like this that you’ ll kill me. "How has it come to this—that doctors administer so much care that they wouldn’t want for themselves The simple, or not-so-simple, answer is this: patients, doctors, and the system.To see how patients play a role, imagine a scenario in which someone has lost consciousness and been admitted to an emergency room, and shocked and scared family members find themselves caught up in a maze of choices. When doctors ask if they want "everything" done, they answer yes. Then the nightmare begins. Feeding into the problem are unrealistic expectations of what doctors can accomplish. For example, many people think of CPR as a reliable lifesaver when, in fact, the results are usually poor.But of course it’s not just patients making these things happen. Doctors play an enabling role, too. The trouble is that even doctors who hate to administer futile care must find a way to address the wishes of patients and families. Imagine, once again, the emergency room with those grieving family members. They do not know the doctor. Establishing trust and confidence under such circumstances is a very delicate thing. People are prepared to think the doctor is acting out of base motives, trying to save time, or money, or effort, especially if the doctor is advising against further treatment.It’s easy to find fault with both doctors and patients in such stories, but in many ways all the parties are simply victims of a larger system that encourages excessive treatment. In some unfortunate cases, doctors use the fee-for-service model to do everything they can, no matter how pointless, to make money. More commonly, though, doctors are fearful of litgation and do whatever they’re asked to avoid getting in trouble. According to the text, doctors seem to accept death more readily than patients because （）
赵先生，50岁，因肝硬化腹水入院。放腹水后出现精神错乱、幻觉、嗜睡伴有扑翼样震颤、脑电图异常等表现。 遵医嘱用硫酸镁导泻，不属于重点观察内容的是
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