题目

When radiologist Pouneh Razavi reads a patient's chest X-ray, she hunts for blips (光点) in the X-ray image that could indicate breast cancer. Then, a second reader, artificial intelligence (AI), looks at the image, and the two compare results.Images from Razavi's practice could help train the AI on blips it missed, so it improves over time. Razavi's colleagues are still collecting data, but they are excited about it.Chest X-rays aren't the only type of medical imaging getting AI assistance. Doctors are using the technology to analyse ultrasound videos of babies' hearts and more. AI technology in medicine is growing rapidly. "Imaging is leading the way," said Stanford University radiologist Curtis Langlotz.It's not unusual for Langlotz to arrive at the hospital early on Saturday mornings to find at least 150 patient images waiting for him to review. He'll examine chest X-rays carefully, looking for abnormal nodules (结节) in the lungs. It's a tiring job that takes training and attention to detail, but even experts can make mistakes. "We need help," Langlotz said.What can be extremely challenging for humans may be a ripe opportunity for AI. With massive quantities of high-quality digital images, scientists can train AI computer models to seek out specific features in a person's scan, like signs of lung disease on an X-ray. Such models may help improve radiologists' accuracy and efficiency, so doctors can prioritize cases based on which ones may need immediate attention.The model isn't ready for widespread roll-out. The researchers first need to train it on more data. "With too many variables that might confuse it, the researchers estimate that more training plus trials to confirm the model works could take five years," says Julia Vogt, a computer scientist at ETH Zurich."Using AI tools thoughtfully could ultimately make health care more efficient," Vogt says. "AI is not magic or perfect, but it has the potential to solve some problems. By easing workloads, for example, AI could give doctors more time with their patients. That would be a huge achievement." （1） What is the main function of AI in Pouneh Razavi's work? A . To collect data for research. B . To train doctors in imaging. C . To detect breast cancer indicators. D . To find out the blips in her images. （2） What does Langlotz's busy Saturday morning show? A . His devotion to work. B . His excellent medical skills. C . A lack of doctors in the local hospital. D . The desire for AI's application in his work. （3） What does the underlined word "roll-out" in paragraph 6 mean? A . Reaction. B . Launch. C . Research. D . Attention. （4） What is Vogt's attitude to AI? A . Objective. B . Uncertain. C . Negative. D . Uncaring. 答案： C D B A

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