据美国巴尔的摩约翰·霍普金斯医学校的一项研究报告,每天饮5小杯咖啡的人比不喝咖啡的人患心脏病的风险大两倍。该项研究调查了1000多饮咖啡史达25年的对象,并跟踪研究了5年。研究人员在不排除对照组的吸烟、高血压高胆固醇等因素的基础上发现,饮 According to a study by the Johns Hopkins School of Medicine in Baltimore, USA, people who drink 5 small cups of coffee a day are twice as likely as those who do not drink coffee to have heart disease. The study investigated over 25 years of drinking over a dozen years of coffee and followed up for 5 years. Researchers in the control group did not rule out smoking, high blood pressure and high cholesterol found on the basis of such factors, drink