Read the following pasage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions
As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.
Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M.
In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered .
What do the second and the third paragraphs of the passage mainly discuss?
A. The link between heart attacks and marriage
B. Unusual risk factors in heart attacks
C. Age and gender factors in heart attacks
D. Myths about lifestyles and heart attacks
B
Kiến thức: Đọc hiểu
Giải thích:
Đoạn thứ hai và thứ ba của đoạn văn chủ yếu thảo luận gì?
A. Mối liên quan giữa các cơn đau tim và hôn nhân
B. Các yếu tố nguy cơ bất thường trong các cơn đau tim
C. Các yếu tố tuổi và giới tính trong các cơn đau tim
D. Thần thoại về lối sống và những cơn đau tim
Thông tin: High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. (Chế độ ăn có hàm lượng chất béo cao và "cuộc sống trên làn đường nhanh" từ lâu đã được biết đến góp phần gây ra bệnh tim. Tuy nhiên, theo các nghiên cứu mới, danh sách các yếu tố nguy cơ có thể dài hơn đáng kể và khá đáng ngạc nhiên.)
Đoạn thứ 2 và 3 nói về các yếu tố bất thường gây ra đau tim như: dễ dàng bị suy tim vào buổi sáng, dễ đau tim xung quanh ngày sinh nhật, người chưa kết hôn nguy cơ bệnh tim cao hơn,…
Đáp án:B