Years ago, doctors often said that pain was a normal part of life. In particular, when older patients __ 56 __ of pain, they were told it was a natural part of aging and they would have to learn to live with it. Times have changed. Today, we take pain __ 57 __. Indeed, pain is now considered the fifth vital sign, as important as blood pressure, temperature, breathing rate and pulse in __ 58 __ a person’s well-being. We know that chronic ( 慢性的 ) pain can disrupt ( 扰乱 ) a person’s life, causing problems that __ 59 __ from missed work to depression. That’s why a growing number of hospitals now depend upon physicians who __ 60 __ in pain medicine. Not only do we evaluate the cause of the pain, which can help us treat the pain better, but we also help provide comprehensive therapy for depression and other psychological and social __ 61 __ related to chronic pain. Such comprehensive therapy often __ 62 __ the work of social workers, psychiatrists ( 心理医生 ) and psychologists, as well as specialists in pain medicine. This modern __ 63 __ for pain management has led to a wealth of innovative treatments which are more effective and with fewer side effects than ever before. Decades ago, there were only a __ 64 __ number of drugs available, and many of them caused __ 65 __ side effects in older people, including dizziness and fatigue. This created a double-edged sword: the medications helped relieve the pain but caused other problems that could be worse than the pain itself.