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　　DURATION: 1 HOUR 　　Do you get enough sleep? Many of us don't. 10 Things You Need to Know About Sleep reveals the science behind why so many find it difficult to nod off, and offers practical tips on the best ways to get a good night's sleep. 　　In a series of experiments, presenter Kate Silverton sets out to help those insomniacs desperate to get some shut eye, help travellers beat ... (展开全部)