为了帮助考生在英语四级考试之前能够对考试内容及考查形式有所了解，编辑老师整理了这篇2014年12月英语四级长篇阅读练习题，希望可以帮助到大家!
The Heart Assoeiation’s Junk Science Diet
A.A recent Cambridge University anal ysis of 76 studies involving more than 650，000 people concluded,“The current evidence does not clearly support guidelines that low consumption of total Saturated fats.“Yet the American Heart Association(AriA.，in its most recent dietary guidelines，held fast to the idea that we must A.l eat low.fat diets for optimal heart health.It’s a stance that—at the very best—is controversiA.，and at worst is dead wrong.As a practicing cardiologist(心脏病学家)for more than three decades，I agree with the latte—it’s dead wrong.Why does the AHA cling to recommendations that fly in the face of scientific evidence?
B.What I discovered was both eye.opening and disturbin9.The AHA not only ignored A.l the other risk factors for heart disease，but it appointed someone with ties to Big Food and bizarre scientific beliefs to lead the guideline-writing paneHust the type of thing’that undermines the public’s confidence in the medical community.The AHA guidelines warrant that saturated fat make up no more than 5 to 6 percent of daily cal ories for adults because this will lower“bad”cholesterol(胆固醇).And，for those people who need blood pressure control，the guidelines A.so suggest lowering sodium(salt)intake to no more than a teaspoon(2，300 mg)daily.Despite many other known risk factors for heart disease，salt and fat were，astonishingly,the only two considered by the AHA panel writing the guidelines.There are many other recognized risk factors the AHA ignored，including blood sugar level，low“good”cholesterol，insulin(胰岛素)levels，and body weight—an of these are influenced by diet.
C.In fact，most people who have heart attacks don’t have elevations in bad cholesterol.They are much more likely to have metabolic syndrome(新陈代谢综合征)—a condition that puts you at high risk for diabetes and heart disease.Interestingly enough，blood triglycerides(甘油三脂)do not go up with eating fat—they go up if you eat a diet high in processed grains，starches，and sugar.Unfortunately for the proponents of high-carbohydrate(糖类)diets，high blood triglycerides are a major risk factor for heart disease.In addition.low fat/high carb diets lower protective“good”cholesterol and raise insulin.
These diets are involved in the development of diabetes.which is a powerful risk factor for developing heart disease.
Heart Cheek Program’s contribution