A．Because palnkillers are prescribed.
B．Because palnkillers can be used in any quantity.
C．Because palnkillers have good quality.
D．Because painkillers can be used in any combination.
A．Overdose deaths have increased nearly 300 percent.
B．The hazards drug abuse brought have greatly increased.
C．The number of treatment admissions increased 200 percent.
D．The cause of drug-related deaths includes heroin.
A．irreplaceable
B．like alcohol
C．lawful and helpful
D．all appropriate
A．the nature of addiction
B．doctors' interest
C．hospital information
D．patients' privacy