SAS宏中用于自动通过电子邮件发送站点指标的迭代%DO循环问题

%macro send_site_metrics;
   %local site_metrics site_name email_subject email_body i;
   
   /* 定义站点指标列表 */
   %let site_metrics = 指标1 指标2 指标3;
   
   /* 定义邮件主题和正文 */
   %let email_subject = "站点指标报告";
   %let email_body = "尊敬的用户，以下是本周站点指标报告：";
   
   /* 循环遍历站点指标列表 */
   %do i = 1 %to %sysfunc(countw(&site_metrics.));
      %let site_name = %scan(&site_metrics., &i.);
      
      /* 生成指标内容 */
      %let metric_content = %sysfunc(get_metric_content(&site_name.));
      
      /* 将指标内容添加到邮件正文 */
      %let email_body = &email_body. &site_name.=&metric_content.;
   %end;
   
   /* 发送邮件 */
   %sysfunc(send_email(&email_subject., &email_body.));
%mend;

/* 运行宏 */
%send_site_metrics;