3. 使用关键词造句:

This study is a randomized trial that investigates whether X therapy improved cognitive function in 40 dementia patients from 6 cities in Japan; it reports improved cognitive function. （28字）

4. 删去赘字（如：study of、investigates）以及重复字；连结剩下句子。

This study is a randomized trial that investigates whether X therapy improved cognitive function in 40 dementia patients from 6 cities in China; it reports improved cognitive functionRandomized trial of X therapy for improving cognitive function in 40 dementia patients from 6 cities in Japan （18字）

5. 删去不必要信息后再润色

Randomized trial of X therapy for improving cognitive function in 40 dementia patients from 6 cities in China reports improved cognitive function

Randomized trial of X therapy for improving cognitive function in 40 dementia patients （13字）

或（改写副标，注重在结果）

X therapy improves cognitive function in 40 dementia patients: A randomized trial （12字）