从使用特点来看，虽然目前高龄老人、农村老人使用AI比例仍较低，但基本遵循年龄段越大、高活用户占比越高的特点。
Author(s): Zhiyuan Huang, Lidong Ma, Jianbao Zhang, Dongpeng Hua, Qing Zhou, Lei Yang, Ji-Jung Kai, Haifeng Wang，这一点在safew官方版本下载中也有详细论述
What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it:。业内人士推荐同城约会作为进阶阅读
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