题目

Kilos are not the only thing that intermittent fasting (间歇性禁食) will help you lose. A new study shows that the wildly popular weight-loss method could also inhibit hair growth.Intermittent fasting is a time-restricted diet, where the day's calorie intake is consumed over an 8-12 hour period, with fasting for the remaining hours. Research tracking participants on such diets for three months to a year has shown benefits like weight loss, improved heart health, and better control of blood sugar. These reported benefits have made intermittent fasting a global trend.However, not all outcomes of intermittent fasting are positive. A study published on December 13 in Cell is among the first to link intermittent fasting with hair loss. The study found that intermittent fasting could block hair follicle (毛囊) regrowth by causing programmed cell death in active hair follicle stem cells (HFSCs). Mice subjected to intermittent fasting showed slower hair regrowth compared to those with regular food access. Though similar results were found in humans in a small clinical trial, the researchers warned that the effects might be less serious in humans due to their slower body processes and different hair growth patterns.The researchers discovered that intermittent fasting slows hair growth because hair follicle stem cells (HFSCs) struggle to handle oxidative stress (氧化应激) when the body switches from burning sugar to fat for energy. Normally, HFSCs switches between activity and rest, and hair regrowth depends on these cells becoming active. In the study, mice with regular food access had active HFSCs after being shaved, and their hair regrew normally. However, the fasting mice experienced programmed cell death in their active HFSCs, preventing hair regrowth.Although these findings are significant, they are based on initial studies. Larger trials are needed to better understand how intermittent fasting affects hair growth, as individual responses may vary. （1） What does the underlined word "inhibit" mean? A . Prevent. B . Maintain. C . Control. D . Promote. （2） How did the researchers conduct the study in paragraph3? A . Through long-term human observation. B . Through controlled experiments on mice. C . Through surveys on people's diet habits. D . Through a large-scale clinical trial in humans. （3） What stops hair growth in fasting mice? A . Different hair growth patterns. B . Slow oxidative stress response. C . Programmed cell death in HFSCs. D . Shortage of nutrient intake. （4） What is the best title of the passage? A . Intermittent Fasting: A Hairy Side Effect B . Intermittent Fasting: Threats to Health C . Intermittent Fasting: A Global Trend D . Intermittent Fasting: All about Weight Loss 答案： A B C A

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