OTTAWA, Aug. 24 (Xinhua) -- Visiting Canadian Prime Minister Mark Carney announced in the Ukrainian capital Kiev new military assistance for Ukraine, according to a news release issued by the Prime ...

OTTAWA, Aug. 22 (Xinhua) -- Canadian Prime Minister Mark Carney said Friday that the country will lift its counter-tariffs on U.S. goods specifically covered under the Canada-U.S.-Mexico Agreement ...

踝关节和中足扭伤患者占急诊患者的 5%，骨折漏诊率高达 15%。为了更好的确定是否需要进行 X 线检查，1992 年提出渥太华踝关节准则（OAR）（图 1）。 OAR 对发现骨折敏感性接近 100%，但准确性仅为 32%。基于 OAR 准则，仍有 50% ...