According to paragraph 5, the oil-rig worker________.

Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 22
Telemedicine, the practice of medicine at a distance, began with the telephone. Today it includes video technology and high-speed communications using satellites.
Although telemedicine occurs in outer space, it will change everyday medical practice on earth. It can help reduce queues and waiting time for doctors in hospitals. In addition, it can reduce the number of journeys a person might need to make to hospital for follow-up treatment and change the treatment of the elderly.
Whereas most people in the developed world can easily visit a doctor or a hospital for a medical check, people in some developing countries are not so fortunate. However, a satellite phone, a computer and some simple technology could establish a direct link between them and hospital specialists.
Telemedicine could also change medical education by bringing the expert skills of the world's leading specialists to students throughout the world. There is already a medical education link between a university in the UK and a university in the Middle East. This means that students and teachers can share in live classes, which is a great improvement on traditional textbooks.
Ships and off-shore installations like drilling platforms are also making increasing use of telemedicine. In one recent case an oil-rig worker had a worsening headache two days after a head injury. Stormy weather prevented him from being taken to the mainland, but a-video-discussion and examination by a doctor on land established that he was not at serious risk.
According to paragraph 5, the oil-rig worker________.
A. was taken to the mainland for treatment
B. treated his head injury by himself
C. had a health check through video
D. established a hospital on land