Some sites, such as Healia, can limit results to those written at a "basic reading" level. Others, such as Mamma Health, limit results to pre-screened medical sources.
有些网站，如Healia，可以对表明“基本阅读”的水平的使用者限制结果，其它如Mamma Health的网站，对使用者的医学渠道将预先过滤限制结果。
It is not like a medical discovery at the basic science molecular or cellular level.
它不像基础医学分子或细胞水平上的医学发现。
In the Asia-Pacific region, the basic social security level is low. Only about 30% of the elder people enjoy old-age pension and 20% of the population are covered by medical insurance.
目前，亚太地区基础社会保障水平很低，仅约30%的老年人享有养老金，约20%的居民享有医疗保障。
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