家庭和社會的作用同樣不可替代。江蘇省老年大學協會秘書長徐建設表示，一方面要加快實施「數字掃盲」，幫助老人提升數字素養；另一方面，要「為習慣智能技術的老人營造清朗網絡空間，開展老人防沉迷、防詐騙等方面教育引導」。
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.”
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