The main treatment of heavy metal poisoning is termination of exposure to the metal. Treatment also consists of the use of various chelating agents that cause the toxic (poison) element to bind with the drug and be excreted in the urine.
Que te pasa, literally mean: What Happens to you? With kindness and preoccupation, it means that the other person thinks something bad is happening to you a he/she wants to help you. With aggressive feeling, it means that the other person feel offended by you, and is asking: what is your fucking problem?.
Que sera, sera. What will be, will be'. So, que sera, sera means 'whatever will be, will be'. Let's take a look at the first set of verses in the song to get a better idea of the deeper meaning behind the phrase. 'When I was just a little girl.