以前儿童患ear infection会医生开anti-biotics给他们吃,但是anti-biotics对儿童不好,所以政府采取措施限制对儿童的anti-biotics用量,这三年total用量减少了,可见政府的措施见效了。问assumption。 选三年来ear infections are unlikely to decrease by themselves.
以前儿童患ear infection会医生开anti-biotics给他们吃,但是anti-biotics对儿童不好,所以政府采取措施限制对儿童的anti-biotics用量,这三年total用量减少了,可见政府的措施见效了。问assumption。 选三年来ear infections are unlikely to decrease by themselves.