(三)Blue light is the light that comes from phones or computers. Hundreds of studies and tests have shown that blue light can make it hardfor people to sleep; this means your body doesn’t get the rest it needs. This can then lead to things like heart problems, feeling unhappy,and getting fat. The good thing is that we also found some things people can do to stay away from this problem. One is not to look at aphone or computer two hours before going to bed. Another thing people can do is to get a lot of bright light from the sun during the day.This will help people sleep at night. The studies have shown us a lot, but there is still more that needs to be done. We will keep onstudying the dark side of blue light to help people avoid problems it may bring.
【題組】41. ( )What does the reading say about blue light?
(A) Blue light makes a room brighter.
(B) Blue light can treat（治療）some health problems.
(C) Blue light comes from phones and computers.
(D) Blue light appears blue to our eyes.