阅读理解：阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项．

　　E-mail can be a powerful new tool in improving communication(交流) between patients and doctors, according to one expert.

　　“Using the Internet, doctors can answer more questions from more patients in a shorter time,” writes Dr. Basal Pal, a famous doctor in Manchester, UK. According to Pal, nearly 40% of American patients say they used E-mail to communicate with a doctor in the past.

　　He notes, however, that although patients have such interest, only up to 2% of doctors in the United States offer E-mail service.

　　Using E-mail, doctors can make sure of their advice and point patient to patient information materials and other resources on the Internet. It's said that more than 10,000 health-oriented websites (网站) already exist now.

　　However, some people worry that widespread use of medical E-mail might set up two kinds of care-one for Internet “haves” and the other for the “have-nots”.

　　But Pal points out that “by the year 2002 nearly every library will offer Internet and E-mail services in the United States”. That allows even low-income patients to use such means. Pal also talks about other possible barriers to the acceptance of medical E-mail.

　　“Doctors may be unwilling to offer E-mail services for fear of increasing workload (工作量) and uncertainty about payment (付款) for the time they spent,” he explained, “ and patients may worry that their medical information might be read by others.” But these problems can all be solved,” he adds.

　　“E-mail may help us a lot in health care, ” Pal concludes. “Patients want to know more than they can get in normal clinics,” he points out, “and they might find communication on the information superhighway (超级公路) less fearful than face-to-face dialogue, with their doctors.”

1．The article introduces a new way of patient-doctor communication________.

[　　]

2．According to the text, some people worry that________.

[　　]

A．it might have to serve both those who have access (访问通道) to the Internet and those who don't so the workload is too heavy

B．it might meet double doubts from the doctors and patients

C．it might make trouble between those who can use the Internet and those who can't

D．it might take trouble between those who have Internet experiences and those who haven't

3．All the following points are advantages (优点) of using medical E-mail except that________.

[　　]

A．it is more convenient (方便的)

B．it is less frightening

C．it enables patients and doctors to understand each other better

D．it provides patients more choices of treatment (治疗)

4．What does the underlined word “barriers” mean?

[　　]

________ people in the world are sending information by E-mail every day.

[　　]