·研究团队邀请了99位PTSD不同程度患者分为三组，包括多种职业和经历，其中一组游玩《俄罗斯方块》，其他组采取传统音乐等疗法，进行对比试验。
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// not critical but safer when bytesToWrite != view.byteLength
Another way to approach dithering is to analyse the input image in order to make informed decisions about how best to perturb pixel values prior to quantisation. Error-diffusion dithering does this by sequentially taking the quantisation error for the current pixel (the difference between the input value and the quantised value) and distributing it to surrounding pixels in variable proportions according to a diffusion kernel . The result is that input pixel values are perturbed just enough to compensate for the error introduced by previous pixels.。关于这个话题，safew官方版本下载提供了深入分析