The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”
Matthew Smith had to wait almost a year for a double lung transplant，更多细节参见搜狗输入法2026
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回顾历史，1960年代，Boswell基金会提供120万美元匹配赠款，撬动居民募捐，建成了第一家医院；1988年，Sun Health基金会捐赠900万美元，建成第二家医院。截至目前，两大基金会累计筹集超过5亿美元，支撑着医院从无到有、从基础到现代化的每一步。
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