BEIJING, Jan. 11(Xinhuanet)-- Sleeping a little bit longer a day might help fight against

BEIJING, Jan. 11(Xinhuanet)-- Sleeping a little bit longer a day might help fight against obesity（肥胖）, a recent study shows. The research-- published in the Archives of Internal Medicine along with an editorial by Turek and Northwestern colleague Joseph Bass commenting on it and related research-- after comparing people of normal weight- a body mass index of less than 25- with those who were overweight or obese , found that sleeping for an extra 20 minutes each night could offer a pain-free way to lose weight.
Insufficient sleep is linked with changes in hormone levels that may stimulate（刺激）appetite. A series of studies in recent months have shown that the less people sleep, the heavier they tend to be.
American researcher Robert Vorona from Eastern Virginia Medical School in Norfolk and colleagues have now examined the relationship between people's self-reported sleep time per 24 hours and their body mass index(BMI). They found that total sleep time and BMI were inversely correlated was total sleep time decreased, BMI increased, except in the severely obese group. Americans experience insufficient sleep and corpulent bodies. Clinicians are aware of the burden of obesity on patients, the study said. Our findings suggest that major extensions of sleep time may not be necessary, as an extra 20 minutes of sleep per night seems to be associated with a lower body mass index, it added. We warn that this study does not establish a cause-and-effect relationship between restricted sleep and obesity (but) investigations demonstrating success in weight loss via extensions of sleep would help greatly to establish such a relationship.
In November 2004, researchers from Columbia University in New York City, New York demonstrated a clear link between the risk of being obese and hours of nightly sleep, finding that people aged 32 to 59 who slept four hours or less per night were 73% more likely to be obese than people who slept between seven and nine hours per night.
【小题1】The research, which was published in the Archives of Internal Medicine, found that .
sleeping for a shorter time a day might help fight agianst obesity
an extra 20 minutes’ sleep each night could offer a way to lose weight wothout pain
total sleep time and body mass index were inversely related
people aged 32 to 59 who slept four hours or less per night were 73% more likely to be obese than people who slept between seven and nine hours per night
【小题2】How many research results are presented in the text?A．Two B．ThreeC．FourD．Five【小题3】 What does the underlined word “obses” probably mean?A．thinB．fatC．energeticD．painful【小题4】According to the text , the author intends to tell us that .A．Sleeping a little bit longer a day might help fight against obesityB．insufficient sleep is linked with changes in hormone livesC．there exists a clear link between the risk of being obeses and hours of nightly sleepD．the less people sleep , the heavier they tend to beB

(答案→)B 解析：【小题1】细节理解题。从第一段的句末可以找到答案。【小题2】综合判断题。文章共四段内容，每一段跟一个研究结果有关，所以正确答案是C 。【小题3】词义理解题。根据第一段第一句的obesity以及之前的overweight 可以推出obese意思是“肥胖的”，因此答案是B。【小题4】综合判断题。文章的首句已经将全文的主旨道出，所以正确答案是A项。

这个问题我还想问问老师呢