A we have not found the need to carry out specific inspections on buildings completed in the past three years in hong kong to check if radioactive substances have been used in building construction . we have been conducting instead periodic surveys on the concentration of radon which , if allowed to accumulate , may pose health risks 一我们不认为有需要特别检验本港在过去三年落成的楼宇是否使用辐射性建筑材料，但已不时测量本港楼宇的氡气量，因为积聚的氡气可能危及人体健康。
We have not found the need to carry out specific inspections on buildings completed in the past three years in hong kong to check if radioactive substances have been used in building construction . we have been conducting instead periodic surveys on the concentration of radon which , if allowed to accumulate , may pose health risks （一）我们不认为有需要特别检验本港在过去三年落成的楼宇是否使用辐射性建筑材料，但已不时测量本港楼宇的氡气量，因为积聚的氡气可能危及人体健康。
