2.2.2   parallel_for_each版的Credit Review

并行版的信用度分析程序与串行版本几乎相差无几：

void UpdatePredictionsParallel(AccountRepository& accounts)  
{  
    parallel_for_each(accounts.begin(), accounts.end(),  
    [   ]  
    (AccountRepository::value_type& record)  
    {  
        Account& account = record.second;  
        Trend trend = Fit(account.Balances());  
        double prediction = PredictIntercept(trend,  
            (account.Balances().size() + g_predictionWindow));  
        account.ParPrediction() = prediction;  
        account.ParWarning() = prediction < account.GetOverdraft();  
    });  
}