to try all possible means to find a solution or some hope in a difficult or unpleasant situation, even though this seems very unlikely（在危难中）抓救命稻草，不放过任何微小的机会
I know I’m just clutching at straws here, but is it possible that the doctors are wrong?我知道我只是在抓救命稻草，但医生有可能是错的吗？