Zhou Xue is a mother of a 9-year-old boy in Jiangsu province.She is （1）

worried

worried

（worry） recently because seven of the 46 children in her son's class have started （2）

wearing

wearing

（wear） glasses."Anxiety about eye health of students is very real these days，" she told China Daily.
   In light of this，Wantang Primary School in Yunnan province has（3）

achieved

achieved

（ achieve）something remarkable（非凡的）-none of its 536 students have myopia（近視），reported China Daily.
   Eye health experts said that while the school might be a unique case，some of its measures are worth learning.First of all，every student is（4）

required

required

[r?'kwa??d] to go outside during class breaks.They play outdoors for over three hours a day，according to Yang Qingyi，a teacher at the school." Even for quiet kids，we （5）

encourage

encourage

[?n'k?nd?] them to take a walk outside，" he said.
   Other measures have also helped.For example，students don't take smartphones or other electronic devices（電子設(shè)備） to school.They get at（6）

least

least

10.5 hours of sleep every day.The school tries to provide a balanced diet.And there are so many green trees all around the school（7）

that

that

students can relax their eyes after class.Nationwide，the（8）

attention

attention

[?'ten??n] on eye health has been growing.The double-reduction policy（雙減政策） came out in July 2021.It says that primary schools should not give homework to first-and second-graders so that they won't（9）

use

use

their eyes too much.There is also a guideline brought out by the National Health Commission，saying that schools should have students' eyesight（10）

exam

exam

[?g'z?m] twice every year.