You are explaining long-term returns to a client. The stock's annualized expected return (drift) is 10%, and volatility is 20%. The client assumes the expected growth of the log stock price after 1 year is also 10%. Do you agree? How do you explain this using stochastic calculus?

你在给客户解释长期收益。股票年化预期收益率（drift）是10%，波动率是20%。客户以为1年后股票对数价格的期望增长也是10%。你同意吗？用随机微积分怎么解释？