单选题 . If you sit all day at an office and worry about its effect on your weight and health, take a few breaks.
That's the advice from a new study that finds that people who sit for extended periods of time without taking short breaks are at higher risk for heart disease than those who take more frequent timeouts to stand up and walk around.
The cardiovascular (心脏血管的) risk that stems from remaining sedentary for prolonged periods of time (at the office, for example) manifests itself in the form of larger waists, higher blood pressure, increased body inflammation and lower levels of "good" cholesterol (胆固醇), the authors noted. What's more, the negative impact of such lengthy bouts (一阵) of inactivity seems to apply even to those who routinely go to the gym.
"These findings are not surprising," said Dr. Murray A. Mittleman, director of the cardiovascular epidemiology research unit at Beth Israel Deaconess Medical Center and an associate professor in the department of epidemiology at the Harvard School of Public Health in Boston.
"In fact, the Surgeon General report recommends that individuals should accumulate activity incrementally throughout the day," noted Mittleman, who was not a member of the Australian research team. "And this is really consistent with that."
The team, led by Genevieve N. Healy, of the Cancer Prevention Research Center in the School of Population Health at the University of Queensland in Herston, Australia, reported their findings in the Jan. 12 online edition of the European Heart Journal.
"Even if you exercise for 30 to 60 minutes a day, what you do for the rest of the day may also be important for your cardiovascular health," Healy explained. "This research suggests that even small changes to a person's activity levels (as little as standing up regularly) might help to lower cardiovascular risk. These changes can be readily incorporated into the person's day-to-day life (including the work environment). Stand up, move more, more often, could be used as a slogan to help get this message across."1. What is the advice from a new study according to the passage? ______

A、 Those who sit for a long time without breaks are at higher risk for heart disease.
B、 Those who have frequent short breaks are at higher risk for heart disease.
C、 Those who sit all day long and worry about their health should take short rests.
D、 Those who sit all day long and take short breaks don't need to worry about their health.

【正确答案】 C

【答案解析】 由题干中的the advice from a new study定位到第二段。
推理判断题。要正确解答此题，需要弄清定位段中That指代的内容。That不是指代后面的成分，而是指代第一段。因此可以得知，这里的建议就是第一段的内容。由此可知C“整天坐着而又担心健康的人应该多一些短暂的休息"为正确答案。
[参考译文] 如果你因整天坐办公室而担心体重和健康，那就多休息一下。
这是一项新研究得出的建议，该研究发现，久坐而不进行短暂休息的人患心脏病的危险要比那些经常站一站、走一走的人高得多。
该研究的发起人写道，患心血管疾病的风险来自长时间久坐不动(例如：在办公室)，表现为腰部较粗、血压较高、身体炎症较多以及“良性”胆固醇水平较低。而且，如此长时间不活动甚至对那些常常去健身房锻炼的人也会产生负面影响。
“这些发现并不让人吃惊，”默里·A. 米特尔曼博士说。他是贝丝·以色列·迪肯尼斯医疗中心的心血管流行病学研究小组主任、波士顿哈佛公共卫生学院流行病学系副教授。
米特尔曼指出：“实际上，卫生部长报告建议个人在一天内要不断递增运动量。这的确是与新的研究结果相符的。”他不是澳大利亚研究组的成员。
由吉尼维夫·N.海利领导的澳大利亚赫斯顿昆士兰大学的人口健康学院癌症预防与研究中心小组在1月12日将他们的研究结果发表在了《欧洲心脏期刊》的网络版上。
“即使每天锻炼30到60分钟，你在一天余下的时间中所做的事情也可能对你的心血管健康很重要，”Healy解释说。“这项研究表明，哪怕一个人运动量的细微变化(细微到像有规律地站一站)也有可能帮助降低患心血管疾病的风险。这些变化随时都能融入一个人的日常生活中(包括工作环境中)。经常站一站，多动动，常动动，这可以作为口号帮助人们传递这一信息。”