For memorizing the contents which would come out at important examinations, I use a smartphone as a tool to enhance my competitiveness. I key in these contents from books to excel files. When taking MRT, I would have a review at these contents through my smartphone. Nevertheless, I found my eyesight have deteriorated obviously. Therefore, having a browse of something through a smartphone for real is not good for eyesight.
For preparing for important examinations, I none the less need my smartphone to greatly enhance my competitiveness for being the winner at important examinations. For me, I have no choice but to keep using a smartphone when taking MRT. For others, they could find something more interesting to do than phubbing. At old age, life could be colorful with good eyesight, but life could be black and white with bad eyesight.
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