Are all sentient lives equally worthy to you?  What kind of sentient life/lives is/are worthy to you?  How much is one such life worth to you?  Will you risk your life to save that life?  To what (reasonable or extraordinary) extent will you risk your life?  Are there any conditions for doing so?  Can you live with knowing that you could have saved that life, if you did not?
 Is your life and/or that life that could be saved life/lives that take/s more lives or saves more lives?  Should you just do your best to save others, and hope they will do their best after?  Beyond saving short-lived physical lives, how about saving long-term spiritual lives?  Should everyone just do their best to save everyone?  Should everyone else answer in the ways you did?