单选题
For more than a decade, dieticians and nutritionists
{{U}}harangue{{/U}} us to lower the amount of fat in our diet. As it happens, their
message is only partly correct. Although all fats are high in calories, certain
fats, like the omega-3 fatty acids commonly found in fish, are actually good for
us, provided we consume them in moderation. Not only do ome-ga-3s reduce the
risk of clot formation in blood vessels, they also lower the amount of
triglycerides, another fatty substance in the blood. The bottom line is that
people who eat 6 to 8 ounces of fatty fish a week experience significantly fewer
heart attacks and strokes. Still on the consume-sparing fists
are saturated fats, commonly found in red meats and whole-milk dairy products.
Recent studies also suggest that another group of fats, called trans-fatty
acids, found in abundance in crackers and cookies prepared with hydrogenated
oils, may be an even more dangerous promoter (引发物) of high cholesterol than
saturated fats. The most immediate benefit from adopting a
healthy diet is that it can lower blood pressure. Even if you don't have
hypertension, decreasing your blood pressure makes your blood vessel springier
(有弹性的) and can help stabilize potentially dangerous plaques in the arteries. Two
major studies have shown that DASH (Dietary Approaches to Stopping Hypertension)
diet, which emphasizes fruits and vegetables, promotes low-fat dairy and
high-fiber grains, permits modest portions of lean meat and reduces sodium
intake, can lower blood pressure as effectively as taking medicine. Just as
important, the foods taste good and aren't too different from what most
Americans are used to eating.
单选题
The underlined word "harangue" in the first sentence most probably mean
______.