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  3. Over the years, relaxation training has been recommended to patients with various stress-related disorders such as chronic pain

Over the years, relaxation training has been recommended to patients with various stress-related disorders such as chronic pain

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问题     Over the years, relaxation training has been recommended to patients with various stress-related disorders such as chronic pain and anxiety. Relaxation is also an important【B1】_____for sleep disorders.
    Most people think of relaxation as the condition of【B2】_____ nonwork-related activities such as reading a book, watching a video or perhaps playing a game. The meaning used here relates to【B3】_____a state of physiological relaxation or calm with decreased activity in the sympathetic nervous system and is【B4】_____by decreased heart rate, blood pressure, brain wave frequency and metabolism.
    【B5】_____methods have been developed to allow people to attain the relaxation response. Common contemporary examples are guided imagery, hypnosis, deep breathing, progressive muscle relaxation, and some forms of yoga. All have in common a repetitive focus for the mind and a passive【B6】_____. The repetitive focus could be a mantra or a word or a phrase or just noticing the breath. In short order, the mind will【B7】_____. For the relaxation response to occur it is necessary to return the mind to the focus on the mantra, the word or the breath. As this occurs again and again, the state of physiological and psychological relaxation develops.
    It is【B8】_____that relaxation is important for sleep. In order to make the transition into stage one sleep it is necessary to relax. People naturally do this as people try to become comfortable and【B9】_____ sleep. In fact, methods that many people use such as imagining a pleasant scene or "counting sheep"【B10】_____this transition from wakefulness into sleep.
【B4】
选项
答案characterized
解析 由空格前的is及空格后的by可知，空格处应填入动词的过去分词形式。characterized意为“以……为典型”。
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