相較之下，YouGov是「自願參加」的調查平台，人們自行報名以換取積分，積分可兌換現金。
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Real-world failures
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A new study reveals that the adult human brain continues to produce new neurons throughout life, a process that is highly active in older individuals with exceptional memories but severely limited in those with Alzheimer’s disease.
· 王芳 · 来源：user资讯