1. Administer a placebo (给予安慰剂)
2. Placebo response (安慰剂反应)
3. Placebo treatment (安慰剂治疗)
4. Placebo group (安慰剂组)
5. Placebo effect (安慰剂效应)
6. Placebo therapy (安慰剂疗法)
7. Placebo-controlled trial (安慰剂对照试验)
8. Placebo effect on pain (安慰剂对疼痛的效应)
9. Placebo effect on mood (安慰剂对情绪的效应)
10. Placebo effect on sleep (安慰剂对睡眠的效应)