A
Crossing your legs is an extremely common habit; most people don’t even notice that they’re doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.
A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. Actually, the blood in your legs has to work against gravity to be pumped back to your heart. Crossing one leg over the other increases resistance, making it even harder for the blood to circulate. This causes your body to increase your blood pressure to push the blood back to the heart.
Crossing your legs can also lead to neck and back pain. When you sit with your legs crossed your hips are in a twisted position, which can cause one of your pelvic bones to turn a bit. Since your pelvic bone supports your neck and spine, this can cause pressure on your lower and middle back and neck.
You also might notice that when you sit with your legs crossed for long periods of time your feet and legs have the feeling of being asleep. This is because when one leg sits on top of the other the veins and nerves in them are pressed, thus bringing about temporary paralysis in the legs, ankles, or feet. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.
So next time you sit down, try to get yourself in the habit of sitting with both of your feet planted flat, hip width apart, on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.
1. Crossing your legs when you sit can lead to _________________.
A. permanent paralysis B. high blood pressure
C. leg numbness D. bone damage
2. What is the passage possibly taken out from?
A. A scientific journal. B. A healthcare guidebook.
C. A medical brochure. D. A medical textbook.
3. In writing this passage, the author intends to __________________.
A. analyze the effect of crossing legs B. emphasize the importance of a good habit
C. explain the function of our body D. alert readers to the harms of crossing legs
【答案】1. C 2. B 3. D
【解析】
【分析】
这是一篇说明文。文章主要讲了跷二郎腿是一种很普遍的习惯，但是它对身体有害。
【1题详解】
细节理解题。答案定位在第四段This is because when one leg sits on top of the other the veins and nerves in them are pressed, thus bringing about temporary paralysis in the legs, ankles, or feet.可知当你坐的时候，跷二郎腿坐着可能会导致腿麻木，故选C。
【2题详解】
推理判断题。这篇文章主要讲了跷二郎腿是一种很普遍的习惯，但是它对身体有害。由此推断出这篇文章可能出自一份医疗指南，故选B。
【3题详解】
写作意图题。答案定位在第一段While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.（虽然你可能觉得跷二郎腿坐着很舒服，但这可能会导致你没有意识到的健康问题。）所以作者写这篇文章的目的是警告读者跷二郎腿的危害，故选D。
【点睛】关于阅读中的细节理解题
1.直接信息题
对此类题型，考生可以首先从问题中找到关键词，然后以此为线索，运用略读及查阅的技巧在文中迅速寻找这一细节，找到后再把这一部分内容仔细阅读一遍，仔细比较所给选项与文中细节的细微区别，在准确理解细节的前提下，最后确定最佳答案。
2.间接信息题
做这类题目时，考生需要对原文信息进行加工处理，然后再进行进一步的推理或鉴别，这是介于事实细节题和推理判断题之间的一种题型，对考生来说有一定难度。
本题第1小题属于细节理解题中的直接信息题。根据第四段This is because when one leg sits on top of the other the veins and nerves in them are pressed, thus bringing about temporary paralysis in the legs, ankles, or feet.（这是因为当一条腿压在另一条腿的上时，其中的静脉和神经受到挤压，从而导致腿、脚踝或脚暂时麻木。）可知当你坐的时候，跷二郎腿坐着可能会导致腿麻木，故选C。
