1. (2023高一上·奉贤月考)  阅读理解

A new study suggests the Apple Watch was able to identify abnormal heart rates that could be linked to a serious heart condition. 

More than 400, 000 Apple Watch users volunteered for the study. It was a project of researchers at the Stanford University School of Medicine. Apple, the American technology company, provided money for the study. Results were recently presented at a major conference on heart health in New Orleans, Louisiana. 

The researchers looked for signs of atrial fibrillation, also called "a-fib", the most common form of irregular heartbeat. Some people with a-fib feel changes in their heartbeat, while others do not. Because of this, many people do not know they have the condition. People with untreated a-fib are about five times more likely to suffer a stroke (中风). In the United States, a-fib causes an estimated 130, 000 deaths and 750, 000 hospitalizations each year.

People taking part in the study wore the Apple Watch for extended periods. The devices contain an app that continuously gathers information without users having to do anything. It uses the watch's light sensor technology to measure blood flow. The system is designed to identify changes that might show an irregular heartbeat.

The researchers said that out of those taking part, about 2, 000 subjects (实验对象) received a warning from the device that they might have a problem. Those individuals were then asked to contact a doctor, who decided whether they should receive more close watch for a possible irregular heartbeat. 

Lloyd Minor, head of Stanford's School of Medicine, said in a statement that the results show great promise in using technology to create "more predictive and preventive health care". Doctor Minor added that a-fib is just one example of a condition devices can help identify in the future. "This study opens the door to further research into wearable technologies and how they might be used to prevent disease before it strikes, " he said.

But some health researchers warned against making any general judgements based on the Apple-financed study. They have called for much more research to measure the effectiveness of wearable devices to identify signs of disease. Richard Kovacs, who was with the American College of Cardiology and was not involved with the study, told the Associated Press that despite the results, the Apple Watch system "is not perfect. " He noted that since the study did not have a comparison group getting regular ECG measurements, there is no way of knowing if the device missed heartbeat problems. This could give users a false sense of security, he said.

Other experts agreed that more studies are needed before similar device-based health observation systems are widely recommended. 

1. （1） What does the new study mainly find out?

   A . Apple Watch can warn of heart problems. B . Apple Watch can protect people against a-fib. C . Abnormal heart rates can cause a stroke. D . Heart problems can be identified and cured.
3. （2） Apple Watch identifies irregular heartbeats by ____. 

   A . measuring the wearer's heart rates B . sending information to the wearer through an app C . extending the time of wearing it D . monitoring the wearer's bloodstream
5. （3） Which of the following might be what Lloyd Minor means in his statement?

   A . It's difficult for doctors to predict and prevent disease now. B . A-fib is just one example of a condition that causes heart problems. C . Wearable technologies might identify and treat any disease one day. D . There are more possibilities of development in wearable technology.
7. （4） It can be concluded from the passage that ____. 

   A . wearable technologies are developing fast but shouldn't be applied to medicine B . the study results are inspiring but more proofs are needed to ensure the accuracy C . the study is sponsored by a commercial company so the results are a little unfair D . device-based health observation systems are convenient and should be widely used